Ofcom did decide, they specifically decided to not implement the CEPT decision decides 2. So that means the restrictions on the amateur services in CEPT countries that are listed in decides 2 do not apply in the UK. Whether Ofcom decide to implement other restrictions is not yet known.
From
https://docdb.cept.org/download/4782
DECIDES
1. that CEPT administrations shall designate the bands 1164-1215 MHz, 1258-1300 MHz, 1559-1610 MHz for the use of the RNSS system, Galileo;
2. that CEPT administrations allowing operations of the amateur and amateur-satellite services across their territory in all or part of the frequency band 1258-1300 MHz shall use the technical and operational measures described in Annex 1 in order to protect RNSS (space-to-Earth);
3. that this Decision enters into force on 27 June 2025;
4. that the preferred date for implementation of this Decision shall be 27 December 2025;
5. that CEPT administrations shall communicate the national measures implementing this Decision to the ECC Chair and the Office when this ECC Decision is nationally implemented.”
So, that means the UK has not signed up to the restrictions in Annex 1.
for EME, the main impact will be a move to the upper part of the band as the limits in 1296 - 1298 MHz are only 50W.
q) For narrowband (bandwidth ≤ 150 kHz) applications operating in the amateur service:
i) 1258-1296 MHz: Maximum value of e.i.r.p.1 = −17 dBW;
ii) 1296-1298 MHz: Maximum transmitter power = 17 dBW;
iii) 1298-1300 MHz: Maximum transmitter power = 22 dBW.
For narrowband Earth-Moon-Earth applications in the amateur service using a symmetric high performance antenna (e.g. boresight gain at least 30 dBi) pointing at least 15 degrees above the horizontal:
iv) 1298-1300 MHz: Maximum transmitter power = 27 dBW
So between 1298 and 1300 MHz amateurs in the CEPT countries that have signed up are to be limited to 22 dBW on the Horizon up to 15 degrees and 27 dBW above 15 degrees. 27 dBW is 500W so more than we are currently allowed in the UK. 22dBW is 160W, same as on 4m currently.
but this doesn't apply in the UK (and presumably UK dependencies) at least not yet.
The EIRP limits in 1258MHz to 1296 MHz are extremely low, spitefully so. It implies Galileo PRS, a supposedly secure and high reliability service, has receivers that can't even handle low level interference. That's not true, the proponents simply wanted to set a precedent and evict the amateurs out of the band entirely. Given this band is also shared with other users, including quite high power radars, it is clear this proposal had little to do with a real problem of harmful interference. The conference recognised this and that's why they failed to get what they wanted at WRC-23 and ended up only with a footnote reminding administrations of the obligation to not cause harmful interference.
The greater restriction is for wideband services, e.g. DATV 150 kHz in the range 1258-1300 MHz the maximum value of e.i.r.p.1 = −17 dBW/1MHz. In effect that means DATV is to be banned in 23cm. I can see in those countries adopting 149.9kHz wide transmissions. You can get a good picture into that bandwidth, especially with 8PSK.
It is worth remembering that in the UK we also have access above 1.3 GHz, where most 23cm repeaters have their outputs.
Mike