DUE TO THE RESTRICTIONS APPLIED TO THE PROVISION OF RADAR SERVICES CAUSED BY THE VOLCANIC DUST CLOUD PASSING OVER THE UK, FARNBOROUGH RADAR CAN ONLY PROVIDE A BASIC SERVICE, ISSUE A VFR CLEARANCE AND CANNOT OBTAIN CLEARANCE TO ENTER CONTROLLED AIRSPACE.
I would presume it was a typo.
It might mean it can only issue a VFR (not IFR) clearance through Class D CTR/CTAs, and cannot provide an IFR clearance through the LTMA and surrounding Class A airways in the South East.