I was pleased that someone explained the "Hamlet" one in such a way that it confirmed what I had guessed at.
I'm stuck on 4 in the bottom right, so assistance with this one may help with the others :
48A - 400m? Record seeing one take first place in commemorative style (8)
????D???
I also have two annoying ones elsewhere :
15A - Tests extremes of tide in port (7)
T?I?S?S
&
16A - Change making him hire (6)
R?F?R?
I'd be grateful as per for any help especially if I've put wrong letters in.