I am on 2 tickets, so I guess I need to hope they will through check my luggage back to LHR from KGL (that's the dream I guess).
If, for whatever reason, I miss the CDG to LHR flight, I guess I'm stuck and will have to spend some Euros? Of if it's looking dodgy see if I can move the flight - although I guess I need to decide 2 hours before departure?