Interesting you should mention the Funnel of the Type 12 (Whitby Class) as the Funnel(s) had a a story of their own, as I indicated concerning the Tons and their modifications due to the Russian Bear having found the secret of Nuclear Explosions helped by a number of Western Traitors.
Modifications were made to the Type 12 Frigates including the Funnel which had to be redesigned on the earlier Tranche of vessels which were constructed to resist an Air Burst Nuclear Explosion which was thought the Russians would use over Convoys, as members are now aware Type 12s were high output high speed War Canoes, unfortunately the Nuclear Design caused problems with choking of fume output and a redesign had to be carried out with a distinctive “hat” I understand the “Scarborough”? retained hers although I stand to be corrected. There were other problems with the Y100 Steam Plant.
As you have previously mentioned the Hull was indeed a dramatic change in design however the design of the Canadian “St Laurent” to me looked better also propelled by the Y100 Plant the Canadians being the first user’s of the system.
My old War Canoe HMS Eastbourne look at the modified Funnel.