Chevron says
instructions from ATC to a military pilot in a MATZ are mandatory, thus making it radar control for military aircraft
Negative Ghostrider... Radar Control is NOT provided to Mil pilots when flying within a MATZ in the UK. Yes he instructions are mandatory, but this would apply even in the pilot were under FIS, there is no need, or mandate to upgrade service to Radar Control (which IIRC can only be applied by Mil Controllers within a known traffic environment i.e. CAS)