Sorry I have no idea of the set-up on your Morgan, though if jiggling a relay to get it going has been a habit, and if the base of the relay is fixed when you were jiggling the relay it`s self, perhaps you were disturbing corroded or burned connections between the base and the relay, and thus remade some sort of temporary connectivity between the relay and it`s base... Pulling the relay and looking at the connections might provide a hint as to whether the points of connection may be the issue..?
The fuel pump draws a fair bit of current and in time the contacts within the relay can burn to the extent that the relay fails to bring the pump on.
The reset you describe seems likely to be an inertia switch which is designed to shut the fuel off after a shunt, though I have heard tales of a re-set being required after hitting a deep pot hole..
All switches and relays can be by passed with a link wire (jumper) to help diagnose where the problem lies.
A wiring diagram might help improve understanding, however it seems wiring systems on Morgans can vary even within the same year/model range. and if you have any immobiliser circuitry involved, it may also have a hand in disabling the fuel pump..?
www.GoMoG.com is another possible source of further information perhaps worth looking at..?
Good luck..
