Zombie lovers

Neck guard? This is a zombie apocalypse we're talking about - not fucking Twilight.

Mountains... from London, where the hell would you go?

I think in London you would ideally want to be on a canal boat on the river, you could also purify the water over time and would be safe from harms way. Plus if you had a rifle you could have fun picking them off.

Neck guard for rear attack, they go for the jugular before the face.

As for mountains, you could head to wales or scotland, maybe eventually over to france for some euro zombies.