Vicker's Windsor is still born, Warwick designed as a 'four engine heavy' instead?

What if the Vicker's Windsor is stillborn and instead the Warwick was designed from the start as a four engine heavy?

Basically this involves an evolution of the Wellington in the same way as the AVRO Lancaster evolved from the ill fated Manchester?

Would this be remotely possible?
If so how successful would it be in operation compared to the other 'heavies'?
What engines and evolution would possibly power this aircraft?
Would it be able to carry the 'Tall Boy' & 'Grand Slam' bombs or would it be hampered by split bomb bays like the Halifax?
 
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