Humaround,
Seems that the CAA are using a standard form letter for renewals to cover different circumstances. In my case (and I expect yours), the PPL(A) was at its first 5 year anniversary and is
already JAR compliant. So you get the pay the lower
fee to cover the next 5 years.
Who knows what level the fee will be at by then - is the revenue used to offset CAA's costs? Or just another flying tax?