Carriers and submarines are dealt with. What about the rest of the Navy?

Destroyers

The Type 82 destroyer will still get built, and with fewer havering delays; in this case she's not a testbed ship but there's more money available, so it's reasonable to assume roughly the same weapons fit, plus the intended Type 988 radar instead of the 965. Sea Dart VLS replaces the Sea Dart and Ikara mounts, giving Flying Fish capability from day one; another two pairs of Type 909s, fore and aft, give the ability to engage six targets at once (pretty much as good as it gets until something like AEGIS comes along). Space still prevents the installation of a hangar. Names will be taken from the historical Type 42s; Bristol (D23) is followed by Birmingham, Glasgow, Newcastle, Southampton, Liverpool, Manchester and Cardiff.

The Type 42 isn't needed to fill the gap left by the missing Type 82, so the next destroyer class may well come rather later and be a very different ship, depending on how the RN's mission changes over the next few years.

The eight ships of the County class will carry on in service, all upgraded to the Batch 2 standard; B turret (historically replaced by a four-box Exocet launcher) is now the site of a small GWS.31 VLS. With no additional radar directors this isn't much use for Sea Dart, and is mostly loaded with Flying Fish.

Frigates

Surprising numbers of Bay and Leopard (AAW), Rothesay, Whitby and Type 15 and 16 (ASW), and Salisbury (radar picket) frigates will survive for flag-showing and escort duties rather than being hastily broken up or sold. Rothesays, Whitbys and Leanders are visible primarily as fleet units, while the Tribals are prone to turn up practically anywhere to show the flag.

However, most of these are being replaced by the new Amazon class, or the Type 19. (I hypothesise here from what little I've found about the real unbuilt Type 19, largely in Rebuilding the Royal Navy, and the historical Type 21 Amazon that was influenced by that design.) During peacetime this class does the unglamorous jobs: fisheries protection, anti-smuggling/piracy, disaster relief, and so on. This means they have to be long-ranged (5,000 miles at 15 knots), fast (normal top speed 28 knots, short bursts of 40 when they kick in the other two (!) Olympus engines), and flexible: a 4.5" gun, a hangar and pad for a small helicopter (Wasp at first, perhaps Lynx/Seagull from the late 1970s), and accommodation for around thirty troops. In wartime their primary job is ASW, so they'll have much the same sonar fit as the historical Leander (supplemented by a 2031 towed array circa 1980), and a Sea Dart VLS loaded mostly with Ikara.

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