"From what I've heard CWL will be 762 all summer, as will be the NCL 757 and 763."
Actually I have found the NCL/CWL/LGW swaparound is for May to the end of July only, then it all reverts back to normal.
Start of May:
B763 from LGW goes to NCL
B762 from NCL goes to CWL
B752 from CWL goes to LGW
At the end of July:
B752 from LGW goes back to CWL
B762 from CWL goes back to NCL
B763 from NCL goes back to LGW