Roland...
If you announced the retirement of the F3 fleet tomorrow it would take 6 months for them all to go. If the current number of Typhoons can't provide sufficient 'cover' to cater for the rogue airliner threat, let alone 6 months downstream, then there is something seriuosly wrong.......
The phrase I used was "massed" bomber threat, I didn't say there was no need for some fighter cover within the UK ADR!!