There are a host of useful plastic and metal figures in 54mm that you can use for Home Guard games.
These 54mm 1:32 British Infantry figures are a useful set of figures, currently available from their creator Steve Weston of Weston Toy Co. via his Toy Soldiers web shop site:
There is a great (2020) deal of three sets of these for £10.00, which is 36 figures for £10.00. This is probably the cheapest new 54 – 56mm figures of this type and quality you will currently find, on special offer as they have had water damaged packaging.
They are described on their retail site as British Khaki infantry, “scaled to sit nicely with Matchbox, TSSD (Toy Soldiers of San Diego), Conte and Austin Miniatures. Superb detailing, excellent quality plastic. Currently the only company currently producing 56mm WWII British figures in plastic!”
This deal is also still available (mid 2020) through the related eBay shop chopped-merc
These attractive plastic figures are steel helmeted, lightly equipped figures with no haversacks and only light webbing, ammunition pouches, water bottles and entrenching tools, which fits the mid to late Home Guard well.
Blog posted by Mark Man of TIN on Home Guard founding day, 14 May 1940 / 2020.