Thanks for your replies Andrew and professor...
@Andrew - I've been using Pingplotter overnight to ping the BBC's site, and like the other tests, didn't see anything correlating with the spikes.
@prof - Thanks for wireless explanation. At least I now know I'm not alone or going paranoid.
I'm a bit puzzled why I still got the spikes when I switched off the Wi-Fi using the 2.32d FW, but will try again tonight now I've upgraded to 2.32e.
It looks like it's the dh65 variant of 2.32d that solves the issue, but that version is still unofficial.
Otherwise, I haven't had any other issues using the 8800NL as a modem/router *touch wood*, and the wireless has been good enough for my limited needs, though I too had to mess around to get it to play nice with a (Samsung?) phone.
My only other option is a HH5a, but I've always been a bit wary of using ISP-supplied hardware - even if I don't know why!
Pipex > Zen > Be > iDNet > Freeola > Zen > BT Infinity 1
Edited by rich_jtg (Sun 21-Jun-15 12:57:43)