Your Vampire speeds are lower than I recall; I do remember 100kt as the threshold speed for landing, and there's a vague memory of about 110kt for lift-off. This was the T11 with no external
The figures I quoted were from the Pilots Notes for the single seat RAF Vampire F1 with Goblin 1 or 2 engine. Although the RAAF built Mk 30 version had the RR Nene, we were issued with the original RAF PN until the RAAF publication was made available.