It seems that several administrations have reduced the total 5MHz spectrum available and the power limits permitted when making available the 5MHz WRC15 15 kHz allocation. The RSGB, working with OFCOM and the UK military, has been trying to avoid this (see the GB2RS news last week).
Really I'd like to see the WRC15 allocation released in the UK too as soon as possible, but with the other "channels" still available. As a seasoned QRPer the power levels really don't bother me. 5W would be fine!
Many times we (I) take for granted the work done on our behalf by volunteers at the RSGB. A quiet thank you. You know who you are, HI.