Roj747- I presume that you have not been down to LCA or PFO on a Saturday or Sunday recently you have zero chance in my experience of getting an earlier slot plus no chance of getting the ground agent to load the pax or aircraft until the last minute,
Both airports are chaos often requiring outbound flights from UK to be delayed as they simply have no space for you or any spare steps. There was some weeks last year that aircraft would arrive and the pax would disembark from rear stairs once off those steps were took to another aircraft to be used and you had just front steps for return to UK.
It is not helped that most LCA departures are on a Pafos2B SID which takes traffic directly over PFO airport often only around 8000ft then all the traffic is on a TOBAL departure up towards Turkey but mixed in with this you have the traffic from TLV and AMM.