Judging by my recent renewal “Everywhen” seems to have kept the Walker Midgley brand, at least this time round.
I think the best approach is to consider your own risks and adjust the cover to suit as far as the options allow.
Could the workshop burn down?
Is it too accessible to burglars?
Which is the more valuable – equipment or models? Which items would be most likely to be stolen? The scum would likely take a large-scale model if they can, or something like a big copper boiler, but probably not a heavy, unwieldy lathe. They might take any house/garden tools also in the workshop, though.
Can you keep at least some of the most valuable in the house? Would it be home contents and luxury / valuable possessions?
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I am not sure if Everywhen /WM offer home insurance but given I have discovered how much my present one, my bank, is charging over twice the average premium for no good reason, I might ask it when renewal falls due.
I commented caustically to them that I might not mind the hefty premium so much if some of my money was not being wasted on pseudo-intellectual “branding consultants” needlessly changing to name to nothing meaningful.