You see fuzzy6988 we can accommodate VFR traffic in the control zones in London
Nice one! I never said you guys couldn't anyway!
Only class A airspace is closed due to no IFR clearances being allowed; all other airspace classifications are still available to VFR traffic.
I thought volcanic ash affects visibility? So one might request an extra pair of eyes to help separate them from other traffic in time of need? Hmmm.....