In 2018 I rode from Land’s End to John o’Groats via the Wild Atlantic Way in Ireland. A distance of some 4,000km. This includes in part Eurovelo 1 and National Cycle Network Routes 3, 4 and 780 (Hebredian Way).
England – from Land’s End to Chepstow
Wales – from Chepstow to Fishguard (Ireland Ferry)
Ireland – from Rosslare to Ballycastle
Scotland – Hebredian Way and the North Coast 500 Route
I could continue to complete Eurovelo 1 by cycling further in Norway and Spain/Portugal