Just in case it interests anyone:
I had a M3 SR+ pearl white on order under salary sacrifice - actual order date w/ Tesla on 8 Jan. It never got matched, and then lockdown happened, and now Zenith has put a hold on ALL orders for foreseeable future.
My original order was for 24 months. It includes everything (insurance, maintenance, tyres etc).
Had a re-think, and determined that it was the same monthly cost to get the LR AWD over 36 months. Was £20/month more to get it in deep blue. This is despite the £500 reduction in grant (salesperson at Zenith advised that my original order had locked in previous £3,500).
So I've decided to cancel original order, and now submitted order for the LR in deep blue.
In the end, when I factor in total cost of ownership this works out almost exactly the same (excluding fuel/electricity entirely) as my previous personal lease for an Audi A3 with a few options (£26k) over 36 months. And actually considerably less if I factor in service and flat tyre I had to pay for.
Am now happier waiting however long it takes (could be September or beyond I guess)...as I think I could live with the LR AWD for longer even if life circumstances change.