OK then, the Home Hub 5 has been up and running for a few days now and things have improved considerably - but we are still experiencing some random disconnections from the router.
BT support have confirmed my suspicion that this isn't a broadband problem. The connection to the property seems very stable. The suggestion is that the router is struggling to cope with the number of devices we have connected to it (if we include wired and wireless devices, there are about 15 in total).
I am ready to try a third party router. I fancy going for one with a built in modem (we connect to the phone line). I've read some reviews, but am not sure which way to go. How much do I need to spend here?
Our broadband speed maxes out at about 35 meg (and isn't likely to increase in the foreseeable future).
The priority is stability, and a router that will handle and manage at least 15 connected devices. At any given time, only a few of those will be drawing any significant bandwidth, but I've given up reminding the kids to switch off their wifi when they aren't using tablets, phones etc.