Rumours persist that RAF P-8 order may be increased from 9 to 14 in a few years, not holding my breath though.RAF and RN both use F35B
Over Syria no combat only used in intelligence and monitoring mode
P-8 look good need 16 units though
As to the F-35, dropping Paveways is nothing new but the sensor suite on the lightning is new, so it's more important to try that out and it would be more valuable in this scenario.