Same problem on mine but worse on the drivers door, although the passenger door didn't fit either when new. Wasn't helped by the dealer stating, in writing, that the doors had dropped because my wife and I had been leaning on them when getting in and out, we hadn't. Both doors have been off a few times for the hinge plates to be adjusted but the drivers door has just dropped again and is rubbing slightly at the bottom front edge against the aluminium rubbing strip.
Would be interested in any feedback or advice as my dealer originally emailed Morgan last year, hasn't had a response yet and don't seem able to sort it out themselves.