Cookshill get good reports, best for natural materials
Lakeland appear to be good but like others say stock can be hit & miss.
Sportfish & John Norris seem to cover my basic needs. There are many others as listed but any supplier is only as good as their last order & a few that have been mentioned have had issues with customers over the years.

Tight Lines

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"The Future's Bright The Future's Wet Fly"