I have another router somewhere which I'll try if I can find it!

Ping results to BBC:

Pinging bbc.co.uk [212.58.244.18] with 32 bytes of data:
Reply from 212.58.244.18: bytes=32 time=16ms TTL=53
Reply from 212.58.244.18: bytes=32 time=16ms TTL=53
Reply from 212.58.244.18: bytes=32 time=15ms TTL=53
Reply from 212.58.244.18: bytes=32 time=17ms TTL=53
Reply from 212.58.244.18: bytes=32 time=19ms TTL=53
Reply from 212.58.244.18: bytes=32 time=16ms TTL=53
Reply from 212.58.244.18: bytes=32 time=15ms TTL=53
Reply from 212.58.244.18: bytes=32 time=16ms TTL=53
Reply from 212.58.244.18: bytes=32 time=23ms TTL=53
Reply from 212.58.244.18: bytes=32 time=16ms TTL=53
Reply from 212.58.244.18: bytes=32 time=18ms TTL=53

Seem fine to me.

I tried my spare router and it seems to be fine now. Could be that my other router was playing up - it's 7 years old although I don't know how long routers are meant to last!