my router is supposed to have the latest version and Telecom haven't suggested it either. In any case why should I as a customer have to do it? That's telecom's responsibility.
yes, but you have a Telecom supplied Thomson router that will have Telecom firmware on it.
It is likely that there is a newer Thomson branded firmware available. Might be worth trying if you are having problems.
Of course you could also hound Telecom to fix the problem - but I like your chances with my suggestion better.