Finally some decent (I hope useful) info. I shall quote her in full so none of it is my fault if incorrect:
‘Hey Michael, more than happy to help.
Admittedly all of my murals have been commissioned by councils so a lot of the sites have mostly been approved but I have a rough idea of procedure.
Firstly, it's worth talking to the council regardless because they might know of some funding pots for national heritage funds and prosperity funds. Especially with it being the legacy of Rovers. Murals aren't cheap so the more funding assistance the better. They might also have council owned walls for your project.
Owner's permission is a big must.
Double check that buildings aren't listed or very close to a listed building. If so you'll have to go through a long drawn out planning permission process and it can take ages (personally from experience)
It's worth getting planning permission in general though. It protects you from the keyboard warriors. Planning permission can involve a consultation phase, like letters of notice stuck to lampposts and letters to neighbouring homes that a large mural is going to be on site and then people have a chance to oppose it.
Once you've jumped over that big hurdle, if people complain during or after the mural is done then... Tough! It's council approved!
If you don't have planning permission, sod's law you'll get a Venkys revolt against the hard work, complain really loudly (on Facebook usually) and then the council will come and tell you no.’
To her credit, she is not a football fan, and hates Venkys vicariously through me.