#1 is an LF.IXe or XVI.
#2 is an LF.IX....I think
#3 is most likely an LF.IXe
#4 is an LF.IX
#5 is an LF.IX (I don't recall any XVI's going to the Russians)
#6 is an LF.IX
#7 is an VIII, most likely an LF
To be perfectly honest, I don't know of any way to tell an LF.IXe from a Mk XVI just by looking at it. I'd have to look up serial numbers to be sure. #7 was particularly easy though.