This is exactly the scenario you can be faced with at Duxford if approaching from the East for the westerly runway (24 ?). You can't join overhead (not allowed) and you can't descend deadside (isn't one) so you have to track parallel and then sort of 180 yourself onto downwind at about crosswind.....
You just have to be careful that you don't stray too far south into Stanstead.
Of course, if you had been given a "straight-in" because the circuit is clear then you wouldn't have to..but that's part of another thread
