That 60mm mortar problem was well considered by Canadian CAPTs Rintjema, Boucher and Erkelens as reported in “ Infantry Company Crew Served Weapons “. Their report is available at

http://citeseerx.ist.psu.edu/viewdoc...=rep1&type=pdf

The British Army seems to generally share/agree with its main conclusions: summarised as infantry company fire based on 60mm mortar and 84mm CG RclR with 40mm HV AGL introduced in preference to 12.7mm HMG.

Hence believe British are now considering the 40mm MV grenade capability as a complement to their recently gained 60mm platoon mortar. The 40mm MV seems particularly suitable for section use and close-in tasks where even the small bombs of the 51mm mortar were previously useful.