GF was first off the mark with blackout curtains????????? WHY DID NO-ONE TELL ME THAT?!!!!!!!!!
Tinker - we were co-sleeping with DS from 12 months as his sleep was awful and I was knackered. I just went cold turkey with the booby one night, but still co-slept (he was about 16 months I think). So, bathed etc as normal, but instead of feeding him to sleep, cuddled him instead. He absolutely howled the house down for 30 mins, but then conked out. Wailed for a further hour in the middle of the night, but that was it. I don't think we ever had to suffer that again. For a couple of weeks, he would wake frequently (3-4 times) in the night, but would settle quickly with a cuddle. About every 3rd night he would sleep right through.
When the warmer weather arrived (18-19 months) his sleep deteriorated as our room was too warm with 3 sweaty bodies! So we simply transferred the whole routine to his room. He has a toddler bed that he can get in and out of. Full overhead light on for getting into PJs, selct 3 books, switch on bedisde lamp, books outside, nightlight only on - usually a whinge for 5 mins. I (or DH) sits at the end of his bed, upright so it's uncomfortable for him to sleep on us, but we're there for cuddles. He always crawls off us and settles himself to sleep.
This week I'm going to try sitting in the chair and insisting that he lies on the bed by himself. Not entirely sure how easy this will be!
Could you go and stay with a sympathetic friend for a few days to do sleep training and thus avoid the nast neighbour?