Checking a bag at LGW for flight from LHR
We will be flying into Gatwick tomorrow, the 17th and staying in London until Sunday, 21st when we will fly BA from LHR to LAX. Would it be possible to check in one suitcase, which won't be needed in London, with BA at LGW for the Sunday flight from LHR? Life was much easier when we could fly into and out of Gatwick.