If you could post up an image of his service record, then I am sure that someone will be able to decipher them
Europa - the shore base at Lowestoft, HQ of the Patrol Service
MMS.66 was part of the 119th Minesweeping Flotilla was based at Portsmouth/ also served in the Normandy Invasion Minesweeping Flotilla
MMS.86 was part of the 104th M/S Flotilla, which worked in the Nore (Thames Estuary)