When searching for Leeds forum on Google, it doesn't even come up. First of all the domain should be registered with Google, costs nothing and takes a few minutes. But I think you may have to be the owner of the domain to register it, I'll look after posting this. Also, once the domain starts being found in Google someone needs to - or between it's active users, start to post about popular events/news topics with SEO friendly titles. Fastest way to grow the forum in my opinion is to just increase the general amount of traffic so this domain ranks above the forums of Leeds United when searching for "Leeds Forum"