I've done a couple of trips from Gamston (in the Lincs AIAA) down to Norfolk and back. Both occasions I routed via Fenland to stay outside of the Danger Areas, and during the second trip I saw quite a few fast jets entering and leaving The Wash DAs. As WB SATCO says, they were making fast turns and climbs/dives in and out of cloud cover, so even a very good lookout would not always protect the spamcan driver such as myself. Giving the Danger Areas a wide berth is probably a good bet.
Both times I had a RIS, but sometimes flying out of Gamston, the service is 'limited to FIS due to workload'. So although good advice to always get a RIS within a AIAA it is not always possible to do so. Worryingly the times when RIS was unavailable was when the skies were busiest, so I make of point of staying fairly high if cloud permits, and at least well above 2k, and flying at an odd number such as 2,700ft rather than the ubiquitous 2500 or 3000. The only way to avoid the AIAA, with so many airbases around my airfield, is to go by road....
