What a shame. Way back in the mists of time [early 1980s] aside from hordes of WW2 soldiers and tanks of both sides, I had packets of Airfix 1/72 scale Romans, Ancient Britons, Robin Hood & Men, Normans, Red Indians and the Tarzan box [1 Tarzan, various lions, simians and antelope, plus a dozen African warriors] - IIRC a box of around 50 figures in a dozen or so poses for the equivalent of about £5 in today's money!
They were great for for Runequest/AD&D, and the weapons were accurately to scale, not the damn great 'cricket bat' swords that seem to be the standard for rpg models.
I've often wondered why Airfix never branched into the rpg market [I guess it's too late now]. But I'd definitely buy some relatively inexpensive, accurately scaled 'realistic' figures - and maybe big monsters in kit form - if Mongoose want to fill the gap...