GB / London: Manna
GB / Edinburgh: David Bann
GB / London: The Gate
GB / London: SAF
A / Vienna: TIAN
USA / NYC: Candle 79
D / Berlin: La Mano Verde

Britain

Southwest England at Wikipedia 

Bath
Acorn Vegetarian Kitchen former Demuths - established 1987

Bristol
Cafe Maitreya

Bristol
Every year  worth to visit, the VEGFESTUK

St. Ives
Bean Inn 

VegCulture.net
USA / NYC: Blossom
A / Vienna: TIAN