REMOV let me know that H&K have redesigned their version of the FN MAG 7.62mm machine gun (designated the L7A2 in the British Army). The new models have been completely redrawn from imperial to metric and also feature a lengthly picatinny rail (what self-respecting military firearm does not these days?).
Manroy Engineering have also redesigned their ME 7.62 GPMG, which is a mix of features from the L7A2 and MAG 58.
A big thank you to REMOV for the photos and information.