It will be interesting to see the changes in August when we're back in the UK (albeit briefly). There's going to be a lot of eating out I think because both sets of families want to see us and on top of that that's a milestone birthday party in Blackpool (offer hopefully Lytham St Anne's but I suspect it will actually be in Blackpool). We're even risking a vegan menu on British Airways for the flights both ways. I wouldn't have done that 3 years ago that's for sure.
Its probably going to depend on where you are as some towns/cities are going to offer more vegan menus than others. Certainly, most of the big chains offer vegan options these days but that might not be where you want to eat! Here is a menu from a well known Italian style chain Zizzis and if you scroll down there is a dairy-free menu. Not a huge amount of choice but progress...
https://www.zizzi.co.uk/data/menus/...er19_Allergen_Menu_Tab_WEB_DrinksAddition.pdf
Pizza Express have a good selection of vegan pizzas and starters.
Here is a list from Blackpool: https://www.happycow.net/europe/england/blackpool/