There is a simple replacement, use the Sentinal
Now I realise it's a bit small so get BAe to stretch it,
With that stretch, it will allow them to increase the bay size and fair in it for reduced drag
An as four engines would be preferred, a little redesign should see that as a possibility
With those extra engines and to help with the weight, the tail could then be redesigned to carry various aerials,
the T tail could be dropped with the engine removal and a more pleasant design look produced.
There, that's getting close to erm ideal
A bit rough, but only a quickie