Someone on a website claims ... true ??
"The Churchill BARV (BARV: Beach Armoured Recovery Vehicle) was a modified Churchill ARV Mk I. They had shingle plates fitted over the suspension arms and deep wading gear. Some of these had a box-shaped dummy turret. Only a few Churchill BARVs were produced, for recovering tanks on beaches, the Sherman proving better for this task."
I have a gutted Churchill too so may do something evil with it.
Just to put the cat amonst the pigeons, I found this, from 'British Tanks and Fighting Vehicles 1914-45', B.T.White, Ian Allen, ISBN 7110 0123 5, page 229 :-
"Beach Armoured Recovery Vehicles
One part of the detailed planning for the D-Day invasion of Europe included
provision for the recovery of “drowned” or disabled armour and vehicles from
the beaches, both above and below the tide level. For this work the REME
Experimental Beach Recovery Section, based at Budleigh Salterton on the Devon
coast designed and experimented with, in 1943, Churchill and Sherman Beach
Armoured Recovery Vehicles.
These early Beach ARVs were ordinary Sherman and Churchill tanks with
the gun turrets replaced by a ?xed rectangular structure and the engine air inlets
and exhaust had tall metal cowls added. The hulls were completely waterproofed
so that the vehicles could wade in up to about seven or eight feet of water. The
BARV crews were trained to use shallow diving apparatus so that towing ropes
could be attached under water to vehicles to be recovered.
The Churchill BARV was abandoned at the prototype stage since the hullwith its side entry doors needed more waterproofng attention than the Shermanand three cowls were needed for the engine compared with the Sherman’s one."and a (not very good) picture . . .

cheers,
Robin.