After asking on here and various other forums I finally managed to get hold of an MX leader through a European source. I have looked at the CADRE site and it looks like it is probably 1996 to 1997 due to the F on the BB, there is also a P denoting a professional frame (does that mean it was ridden by a pro at some point, despite no number hanger, as it isn't a Merckx professional frameset??).
However, it has the small Eddy and large Merckx lettering indicitive of the later (2000s) frames. It is also in a colour scheme I have never seen before, it is quite reminisant of the Podio shoes they brought out in 1994. Anyone have any more info??
Another thing is that the headtube merckx label is a sticker, not paint as on my OS Strada. It is definately an MX leader, the tubing is ridiculous, it tapers down to the BB and also from the top tube into the headtube, can't wait to get it built up with the 9 speed record titanium groupset I have and see how it rides!