The Trout Flies That Matter in the UK

By Alex Clayton · Updated 23 October 2026

Tackle shops sell hundreds of trout flies, and most of them catch more anglers than fish. A UK fly box needs far fewer: a handful of patterns from five families (dry flies, nymphs, buzzers, wet flies and one lure) covers rivers and stillwaters.

Most lists cover one type of water, skip hook sizes and ignore the rules. This page covers both waters, gives sizes where a source confirms them, and sticks to the patterns. Tactics for buzzers and wet flies are on stillwater fly fishing, and presentation is on dry fly fishing.

Dries, Nymphs, Buzzers, Wets and Lures: The Five Families

Know the family and you know where in the water a fly belongs before you open the box.

Family	What it imitates	Where it fishes	Patterns on this page
Dry	Adult insect on the surface	On top	Parachute Adams, Elk-hair Caddis
Nymph	Larval insect stage	Below the surface, often near the bottom	Pheasant Tail, Gold-Ribbed Hare’s Ear
Buzzer	Midge pupa	Hanging or rising slowly, mostly stillwater	Claret Buzzer, Diawl Bach
Wet / soft hackle	Drowned insect or general food	Just under the surface, fished as a team	Partridge and Orange, Peacock and Claret, Silver Invicta, Red Tag
Lure	Small fish or leech	Pulled through the water to provoke a chase	Woolly Bugger

Buzzers are the family beginners mix up with nymphs. A buzzer imitates a midge pupa, the stage that hangs or rises slowly before hatching. It is a key stillwater food, so it gets its own family.

Spinners and metal lures are covered on trout lures. For the wider range of artificials, start at lures and artificial baits.

Best River Dry Flies: Parachute Adams, Elk-hair Caddis and Friends

If you keep only one fly, keep a Parachute Adams. That is the advice of Charles Rangeley-Wilson in his selection for The Field.

It earns that place by suggesting rather than copying. The grey body and upright post look enough like an olive or another upwinged fly to fool trout across a wide range of hatches. Carry it in sizes 12 to 20 and go smaller as the naturals get smaller. The Field’s top 10 rates it most useful from late March to mid June, though it is worth a cast whenever upwinged flies are hatching.

The Elk-hair Caddis does the same job for sedges and covers many caddis hatches. Its elk-hair wing helps it float on broken water, and Rangeley-Wilson gives the same 12 to 20 size range.

Add seasonal specialists as the year turns. The Field’s top 10 trout flies gives these windows:

Black Gnat: March, on slow water
Hawthorn: April to May
Grey Wulff: May, on fast water, where a bushy, high-floating fly stays visible
Mayfly pattern: May to June (see mayfly season)
Blue Dun: mid April to late October
Klinkhammer: all year, sitting low in the surface film

Small can beat big. Rangeley-Wilson describes size 22 gnats taking a 7lb (3.2kg) trout on a big river, so when gnats are hatching, carry something that tiny.

If you only buy two river dries, make them a Parachute Adams and an Elk-hair Caddis in a spread of sizes from 12 to 20. Casting and drift are covered on dry fly fishing.

Buzzers and Nymphs: The Flies Trout Eat Most

A flat, empty surface does not mean trout have stopped feeding. Much of their food lives below it, and buzzers and nymphs are the trout flies that imitate it: nymphs mainly on rivers, buzzers mainly on stillwaters.

Pheasant Tail Nymph

Frank Sawyer, a river keeper on the Hampshire Avon, created the Pheasant Tail Nymph in 1958, according to its Wikipedia entry. He tied it with fine copper wire instead of thread, which adds weight and helps it sink. The Field lists it as a fly for all year. It is also a classic tie, so if you want to make your own, start with fly tying for beginners.

Gold-Ribbed Hare’s Ear

Where the Pheasant Tail is slim, the Hare’s Ear is scruffy, a general nymph that suggests several foods at once. The Field rates it all year and best from March to June, and Orvis UK includes it among its stillwater staples.

Claret Buzzer and Diawl Bach

On stillwaters, the Claret Buzzer and the Diawl Bach both appear in the Orvis UK stillwater wet flies list. Both are slim, simple patterns. The Claret Buzzer imitates a midge pupa, and the Diawl Bach suggests the same small food.

None of our sources gives hook sizes for these four, so match the size to the naturals you see and check the pack. Depths and retrieves are covered on stillwater fly fishing and nymph fishing.

Quick comparison: pick the slim Pheasant Tail when you want a neat, sinking profile, and the scruffier Hare’s Ear when you want one fly that suggests a bit of everything.

Stillwater Wet Flies Worth Carrying

Open a box of traditional wets and it is hard to tell which ones still earn their place. Four patterns from the Orvis UK stillwater selection cover most days:

Partridge and Orange: a sparse soft hackle that also works on rivers
Peacock and Claret: a dark pattern with a peacock herl body
Silver Invicta: bright and flashy, a contrast to the darker patterns
Red Tag: an attractor with a red tail, tied to provoke a reaction rather than imitate a particular insect

Traditional wets are usually fished as a team of two or three flies spaced along the leader, so each one fishes at a different depth. That lets you try several stillwater trout flies at once and find the depth the fish are holding at.

The retrieve matters as much as the pattern, and that belongs on the stillwater fly fishing page. None of our sources gives hook sizes for these four, so ask at the fishery or your tackle shop what is working.

Best for: stillwater anglers fishing a team on a floating or intermediate line. Skip if: you only fish rivers, where the Partridge and Orange is the one of the four you are most likely to use.

Lures: When a Woolly Bugger Earns Its Place

One lure is enough for most trout anglers, and the Woolly Bugger is the one to carry. According to its Wikipedia entry, it is credited to Russell Blessing around 1967 and is tied on long-shank hooks in sizes 2 to 14, most often 2 to 12. The Field lists it as a fly for all year.

Reach for it when nothing is rising, the water is coloured or the fish ignore smaller patterns. Its moving marabou tail suggests a leech or small fish and can provoke a chase.

It is lure-style fishing, though, and The Field quotes Bill Hunter’s view that it should be banned from some waters. Some fisheries restrict lures or set fly-only rules, so check the fishery rules before you tie one on.

The verdict: carry a few for hard days, but treat the Woolly Bugger as a back-up, not your first choice.

Which Trout Fly When: A Month-by-Month Table

Matching the pattern to the month takes most of the guesswork out of a river session. The table follows The Field’s top 10 month guidance.

Month window	River patterns
March	Black Gnat (slow water), Hare’s Ear (best March to June)
Late March to mid June	Parachute Adams
April to May	Hawthorn
May	Grey Wulff (fast water)
May to June	Mayfly patterns
Mid April to late October	Blue Dun
All year	Pheasant Tail, Hare’s Ear, Klinkhammer, Woolly Bugger

Stillwater patterns are not tied to fixed dates in our sources. Carry buzzers, the Diawl Bach, a team of wets and a Woolly Bugger through the season, and let the fish tell you which one is working.

Water clarity matters too. As a rule of thumb, clear water and rising fish suit dries and slim nymphs. Coloured or cold water often calls for something bigger or brighter, such as a Silver Invicta or a Woolly Bugger.

The river rows only apply when the river is open. River trout close seasons are set by local byelaws, so check fishing seasons for your area. In England you can fish for rainbow trout all year in all stillwaters, according to GOV.UK.

A Starter Trout Fly Box: Seven Patterns to Buy First

Seven patterns will see you through a first season on rivers and stillwaters, leaving more money for line and leaders.

Pattern	Family	Water	Hook sizes
Parachute Adams	Dry	River	12 to 20
Elk-hair Caddis	Dry	River	12 to 20
Pheasant Tail Nymph	Nymph	Both	Match the naturals
Gold-Ribbed Hare’s Ear	Nymph	Both	Match the naturals
Claret Buzzer	Buzzer	Stillwater	Match the naturals
Partridge and Orange	Wet	Both	Match the naturals
Woolly Bugger	Lure	Both	2 to 14 (long shank)

Buy two or three of each, because you will lose flies to trees and weed. Where a size range is given, start in the middle and add smaller sizes as you learn your water’s hatches. Keep dries and subsurface flies in separate compartments so wet flies don’t flatten the hackles on your dries.

Choose barbless flies or flatten the barbs yourself. Orvis UK recommends barbless hooks as gentler on fish, though that is advice rather than law.

For the best trout flies UK beginners can start with, buy these seven first and add a pattern only when a hatch or water calls for one. The rest of the kit is in fly fishing for beginners.

Rules to Check Before You Tie On

You need a rod licence to fish for trout in England, and season and method rules are set locally.

River close seasons: these vary by area and are set in local byelaws (GOV.UK). You can fish for trout on rivers during the coarse close season (15 March to 15 June), but lure and bait rules vary by region, and GOV.UK lists artificial fly only in the South East.
Stillwaters: rainbow trout can be fished all year in all stillwaters. Brown trout can be fished all year only in fully enclosed stillwaters (GOV.UK).
Tackle: gaffs and tailers are banned, and foul-hooked fish must be returned alive (GOV.UK).
Barbless and fly-only rules: the GOV.UK national rules for England don’t set these. They come from fishery rules or regional byelaws, so check both.

In Wales, check Natural Resources Wales. Scotland and Northern Ireland have their own rules, so check the relevant authority.

Frequently asked questions

What is the best trout fly for beginners?

On rivers, the Parachute Adams in sizes 12 to 20 is the most useful single dry fly, and The Field's Rangeley-Wilson names it as the one to keep above all others. Below the surface, carry a Pheasant Tail Nymph or a buzzer, and keep a Woolly Bugger for days when nothing is showing.

What are the best flies for brown trout?

On rivers, start with the Parachute Adams and Elk-hair Caddis on the surface and the Pheasant Tail and Hare's Ear nymphs below it. Add seasonal patterns such as the Hawthorn and a mayfly as those hatches arrive. Our brown trout guide covers the species in more detail.

What is the difference between a buzzer and a nymph?

A buzzer imitates a midge pupa and is mainly a stillwater fly. Nymph is the broader term for flies that imitate the underwater stages of insects, such as the Pheasant Tail and Hare's Ear. Buzzers matter most on stillwaters, nymphs on rivers.

Can you fly fish for trout all year in England?

On stillwaters, yes for rainbow trout, and for brown trout only on fully enclosed stillwaters, according to GOV.UK. Rivers have trout close seasons set in local byelaws, so check the close season and your Environment Agency regional byelaws before you go.