This may be of use or at least of interest... (http://www.dracos.co.uk/play/locating-postboxes/)

That was one of the ones I found, yes. I think it was the best of the bunch, but I'm pretty sure I know of at least one postbox it doesn't show (I'll find out for sure at lunchtime), and given that I have specific knowledge of about five postboxes in total that's not a good hit rate.

I'm also suspicious of the fact that it doesn't show my just-vanished one. That either makes it bang up to date or even more incomplete, and I think I'd bet on the latter...

But thanks :-)

Ah, it did look as though Cambridge was fairly well covered, sorry if it's not helpful after all.

Would be good if you could submit the locations you know about, though (if you don't mind that knowledge being in the public domain)! :)

Yes; I plan to walk past my suspected postbox on my way to lunch, and if it's there as I think I remember it being then I'll look into adding it.

OK that's bizarre, I put my postcode in, but the postbox nearest me isn't either a) on the map or b) in the list of postcodes/addresses available to put on the map! There should be one on Macaulay Avenue and one on Hinton Way but neither are there!

I think I'll see if I can contact the author!

I'll be seeing him on Thursday! The data on the site was gathered by putting in a couple of FOI requests to the royal mail (eg, http://www.whatdotheyknow.com/request/last_collection_times ) - perhaps its time for an updated FOI request...

Ha, small world. He replied anyway, and I've promised to try remember to go look at the serial numbers on the postboxes in question.