I'm pretty sure that the TFR used J-band.
The main problem, apart from drift angles at slow UK training speeds, was that people didn't understand the terrain limitations and tried to use it in mountainous terrain for which it was not cleared.
My night TFR check didn't last long. We'd just let down to low level and started the run when a light came on. "Bugger", I thought, "must be the TFR fail light". But no, it was the Main Warning amber lights. Then the captain announced that several PFCU lights were also on and asked the AEO WTF was going on - to be told that the entire no. 3 load busbar had failed. So off we went to Leeming, threw it on the ground, rang home, had a few beers whilst waiting for the bus, then snored our way back to sunny Scampton.
It turned out the jet had recently been serviced and ALL the no. 3 main 200v fuses in the power compartment had been incorrectly refitted.
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