I hear you.

I doubt this will help but you never know... DD has been the same and OMG can that kid scream! Its the high pitch that just buzzes your ears and does my head in. Anyhoo, I went and stayed at mums for a few days (she was on holiday). I did the normal routine and put her in mums bed (huuuuge gamble, she is still in a cot at home), extra bumpats to get her to lie down. She wandered out once or twice, but I didn't make a big issue out of it, took her hand and walked her back in.
To my total disbelief, she went to sleep on her own. And the next night too. Once or twice my sister went in to resettle her when she called out too loudly, but she went to sleep fine!

She was the same again when I got home (I'm still in disbelief), had a one or two crap nights but on the whole she has started to just go to sleep. Sometimes I hear her playing in her cot up to 45 mins later (again- unheard of), but she goes to sleep on her own.

My "theory" is going to mums broke the screaming/no bed routine. .

She is very,very clingy atm too, I'm a bit worried we'll go backwards when she starts childcare tho....