Give them a call and check, but was fold the existing one could be cancelled (but no refund given) and the new fastrack wpuld superceed it. The main thing is you still have the passport…and that is in your favour. We didnt as we sent it straight away… therefore you can do a 1 wk fasttrack, we could ONLY do that once we had the passport back in hand, which would have taken up to 2 weeks to get back out the system. Seen others take your route and be successful. Believe me we would have snapped your hand off to be in your position!