When I was in the Falklands on 1435 Flt in 1993, the Tornado F3’s there had the tail-letters F, H and C named after the three 1435 Flt Gloster Gladiators (Faith, Hope and Charity) that helped to defend Malta against the Italians in WW2. However, there was 4 Tornados, so they named the 4th one D – Desperation.
When 1435 Flt reformed from the rump of 23 Sqn down south with Phantoms in Oct 88, they had F,H,C and D as well, also with the name on the nose (well they did when I looked around 'D' and 'C' in their shelters in early 89).