Links - cycling holidays

Northumbria & around, including C2C
Note that a number of companies call the Sustrans C2C route
the Coast to Coast, while others more correctly use the latter name to describe
a route further south through Yorkshire
Cycle Active - based in Penrith, Cumbria - C2C
Discovery Travel - based near York - C2C and Coast to Coast
Explore Britain - based in Co Durham - C2C
Fat Tyres Mountain Biking - based in Lancashire - do stuff in North East
Not Entirely Sure - North Northumberland based
Saddle Skedaddle - based in Newcastle - C2C
Stanley Taxis & Mini Coach Hire - transport rather than holidays - County Durham based, for C2C
TDK Travel - similar transport for cyclists - for C2C etc - County Durham based again

Lake District & Cumbria
GrinUpNorth - Cockermouth - bike hire and guides - C2C
Holiday Lakeland - based in Cumbria - C2C, Reivers Cycle  Route and Coast & Castles
Sherpa Van Holidays - Yorkshire Dales, the Lakes, C2C etc - baggage and bike transport
Summitreks - based in Coniston, Lake District - one-centre activities rather than touring

Borders & rest of Scotland
Hooked on Cycling - Scotland and Europe - based in West Lothian
SYHA - hostel based cycling holidays
Glenmore Lodge National Centre - Mountain Bike Leader course - Aviemore, Scotland
Wild Cat Bike Tours - Scotland and abroad
Scottish Cycling Holidays - various UK and other tours - based in Blairgowrie, Perthshire

UK
Acorn Activities
Beics Eryri Cycle Tours - Snowdonia, Wales
Bicycle Beano - based in Builth Wells
Bike Events - mainly challenge or long distance rides, but some good family holidays in Europe
BikeBus - based in Edinburgh
Bike Tours - based in Bath
Byways Bike Breaks - Cheshire, Shropshire & the Peaks
Cycling Instructional Schools - based in Mold, Wales
Company of Cyclists - cycle weekends only
Cycle Drive Tours - Dover based for trips to continent
Cycling for Softies
Country Lanes - based in New Forest, Hampshire
European Bike Express - Middlesbrough to Europe
History on your Handlebars - Wiltshire heritage rides
Iron Donkey Bicycle Touring - Ireland
London Bicycle Tour Co - near Waterloo Station
Sports Tours - some cycling related holidays
PedalAway - based in Ross-on-Wye
Plas Y Brenin National Centre - no cycling, but looks good anyway  - North Wales
Red Spokes Cycling Adventures - exotic locations - based in London
Rough Tracks - UK and Europe - C2C
Saddle Skedaddle - based in Newcastle
Sherpa Expeditions - UK and abroad
Suffolk Cycle Breaks
Tandem Experience - based at Ironbridge, Shropshire, but holidays in lots of places
Tracks 'n' Trails - based in Ripon, North Yorks
Trail Break
2 Wheel Treks - south of England, Lakes, C2C and more
Wide Open Road
Wild Rover Adventure Tours - Northern Ireland & the Republic
Yorkshire Bikeliner - bike bus from northern England to Ireland and
Cherbourg in France