Hi Chris, yes mate I did a firmware update when the problem first started probably a year ago now, and it didn't make a difference. Trouble is the router is "ancient" in terms of IT kit and Linksys replaced the model at least 2 years ago, and no longer actively support the model I have.
TBH I've learned to live with the problem now, as the rest of the NTL service is excellent, and my cnnection rarely drops more than once a night anyway, and occasionally I get three or four nights with no problems at all.
Its probably time to replace the router anyway, as I suspect the one I have probably isn't able to cope with the holy grail of 10 meg