So what sort of state could the British Armed Forces be in now if British Governments had not slashed defence spending after the collapse of the Warsaw Pact and Soviet Union but instead maintained Cold War levels of expenditure to this day. In 1984 this was 5.5% of GDP. Current defence spending is about 2% GDP.
Spending at 5.5% is a bit steep at the end of the Cold War to be honest PLP.
I think the actual figure quoted was 3.6% in 1989 (ONS in the library)
You need to somehow get rid of the cuts that happened post 1980 (eg RN vessels getting broomed to fund Trident etc)
As for your original question . . . just off the top of my head
The BA would possibly remain the same as the UK has never maintained a large peace time standing army.
Firstly could you see a doubling of the RAF if the UK withdraws from Germany?, this was a plan originally put forward to increase the RAF but John Nott opted to decrease the RN?
Secondly The RAF would as other posters have stated retired the Tonka earlier and bought more Tiffies., plus you could see 60 or so C-17's being purchased instead of C-130J's, and A400M's.
As for the RN, possibly three QE's originally built in early 90's to CATOBAR spec's with F-18K Super Hornets.
21 x Astute SSN's built to replace entire RN SSn fleet (Swiftsure & Trafalgar)
A full fleet of 12 Type 45's
A full 3 batches (14) of Type 26's to replace all of the RN's Type 22's.