DaveReidUK - The rules have been relaxed for at least a year
Yes, I'm well aware of the trials. However they are a sticking-plaster approach to the capacity issue (ad-hoc, short-term increases in capacity/resilience, triggered by specific delay criteria) and do not include either unrestricted use of mixed mode nor any relaxation of the night quota.
It's those latter two measures which various proponents are lobbying for as a means of maximising the capacity of the existing runways, and permission to deploy them has most definitely
not been granted.
Well not yet, anyway.