Update: after resetting DNS, router, new IP, new router password
Also using chrome browser app instead of safari on my iPhone the redirect problem exists.
When looking up the issue on apple forums it suggest that it would happen on all websites and on google searches. The virus being called 'google redirect virus', which will redirect you to a dodgy site when you search via google. All the fixes above seem to relate to this supposed virus. So far this problem only occurs for me within the B&B forums.
The only other option left would be for me to factory reset my iPhone (which isn't cracked btw, so I don't see how it would get infected) obviously I don't want to do this.
Perhaps it is some malicious script that has hijacked B&B forums.
Maybe turn your JavaScript setting to off might stop it happening, but it could also have a detrimental effect on viewing certain websites and the things you can do on them.
What forum engine does b&b run off? E.g Vanilla forums or is it a custom build?
Maybe there is a update fix?