It is, although with the caveat that as a result of everyone knowing this it’s often pretty difficult to get a good spot. Would imagine it’s even worse for the footy.
Few good places kicking about in London. Temple Brewhouse is great if I can be bothered to hang around in that area long enough after work, Horatia on Holloway Road doesn’t feel like a footy pub in any way but has a big screen at the back where you can watch games comfortably, Coach and Horses in Stoke Newington is a pretty crap pub that’s surprisingly great for footy (and which no-one really seems to know about, easy to plonk yourself in a great spot even for big games). Would love to find one I love though.