With respect, gentlemen, I feel that all I can suggest to RTO and PENKO et al is that they concentrate more on the Sector frequency, especially when in UK airspace, and leave 121.500 alone until it is a little more quiet.
Your transit (or Approach) Control is far more important to your flight than having the volume turned up on Box 2 or 3.
LHR/LGW for example are just a little bit more busy than CPH most of the time.
Rgds, Sleeve.