
The next issue is that the report does not state how the present costing was done. Was it lenient/reasonable/or excessive (future proofed) AT THE TIME? Without that inform it is not possible to make a reasoned decision as to whether the increase is reasonable/justified.
That said, assuming that the current pricing is reasonable, I personally think the increase is reasonable, adjusted for 13 years. Further, as variations are due for a £6 decrease, given the number of variations I put in over the life of my FAC I will probably end up paying about the same, if not a little bit less overall

*it isn't licencing as they don't issue licences