A beginning:

The Vegan Society
The Vegetarian Society

Campaigning sites
People for the Ethical Treatment of Animals
Compassion in World Farming
Free From Harm (and possibly the best article on veganism ever):

COVID-19: Why going vegan might help prevent a future pandemic:

This one gives you, at the bottom of the home page, the numbers of exactly how many animals have been killed for food in the seconds it takes you to scroll to the bottom of the page. ‘Shocking’ doesn’t start to go there. It’s numbing. Read this guy’s books (see ‘Resources’).

Further info (inc. the environmental aspects, with references & stats)  those tricky sticky questions non-vegans will raise, & how to respond
The World Peace Diet

George Monbiot’s website has a number of informed articles on aspects – and the costs – of meat-eating. Monbiot himself was a vegan, then wasn’t, but is again (see below) as he now feels it’s the only sustainable way forward. His focus is on land use and climate change. (George Monbiot is now a vegan. Here’s why)

Climate emergency

The protein myth (bringing up the vegan child) this link will calculate for you how many animals’ lives you’ve saved by not eating them, and how many pounds of C02 you haven’t released into the atmosphere… Read and feel proud! the organic veg-box company Riverford also provide organic meat. However, they are campaigning to cut our meat consumption

Buddhism and the vegan (Thich Nhat Hanh)

Nutritional info  Full of excellent info
(information on the controversy about soy) UK info, courses, recipes etc
(has some stories about people’s improving health on a vegan diet, and some info re vegan nutrition on the site)

truly wonderful recipes, and info

(fabulous recipes)
her vegan tiramisu is a dream…

Sourcing stuff
Sourcing vegan/eco stuff that’s hard to find locally
You might also be interested in
and (protein-rich beans, lentils other pulses grown in GB)

Clothing  Once, back in the day, I was a shoemaker. These people were friends, and they continue with their shoes and their ethical policies. You can buy vegan made-to-measure shoes here.

Vegan places to stay
In the Northumbrian border with Scotland:

And have a look at this link; here’s the son of a British farmer sending an unlikely message (for someone in such a position):

Another video: