RN strength in the Med in 1914 was 3 battle cruisers, 4 heavy and 4 light cruisers and the 5th destroyer flotilla of 16 modern ships. I imagine that with the Pas de Calais in German hands those BCs would deploy home in late 14, maybe to cover the 2 BCs sent to the Falklands. That makes me think any offensive on land wouldn't involve an amphibious landing, perhaps an advance across the Sinai and up palestine like occred later.
How does the pre-war agreement for the British to defend the French channel coast change with German occupation down past Boulogne? The agreement saw the French battle squadron at Brest move to Toulon but a cruiser squadron remained to patrol the western channel. If this changes any French led moves in the Med will also be limited to those not needing a lot of ships.