I think you might not understand the impact of losing EWA. Without one in place, you don't get to have an LPV. Sure it technically works without an EWA (you can receive the signal) but Jeppesen et al will remove the minima / code and the FAS from the Nav data in the next update/AIRAC beyond the date specified in the gov.uk document (Jun 21).
Flyer article
FLYER asked the CAA what would happen if the UK failed to negotiate access to the EGNOS service. The full reply is:
“Subject to the outcome of the ongoing negotiations, we believe that the European Satellite Services Provider (ESSP) will terminate EGNOS Working Agreements (EWA) with aerodromes, affecting the provision of LPV operations. These will then be NOTAM’d as Not Available. The LNAV or LNAV/VNAV operating minima are unaffected.
“Following termination of the EWA, UK aerodromes will not be supported by the certified service provider/ANSP, i.e. ESSP, although we understand that the signal-in-space will still be received by avionics equipment.
“The CAA is not expecting pilots to disable EGNOS within the equipment and indeed, on some models such an action may not be straight forward.
“The CAA is therefore content to let the avionics box select the highest integrity approach mode available, but any approach should only be flight-planned and flown to the LNAV minima.
LPV operations are not available.”