KB, into service or not, we are into speculation here. Remember Vulcans hadn't flight refuelled for 18 years, they didn't have ARMs. The Nimrod was not AAR capable and I don't think our C130 was either.
We talked of Vulcans self-designating with LGB. 11 years later the Tornado still needed 3rd party designation with only the Bucc self-designating.
So some suggestions are realistic alternatives, others pure speculation on what we might have been able to do given 6 months more time. JP233 is possibly in that area as indeed would a Tornado deployment to ASI.
The deterrent value of an unknown aircraft like Tornado however was wholly different to the assumed capability of 4 Vulcan during Confrontation as we supposedly had a nuclear capabilty for 7 years.