Thanks for your suggestions. In the end I drilled a small hole either side of the loose clip connectors, and looped a cable tie round the connector to hold it tight against the earthing chassis. This is sufficient for the bulbs to have good contact on the connector and to earth.
Hi. I collected a 1997 Leda Chiltern yesterday. It was my fathers, and not been used for a long time. I have a problem with the rear light connectors. Where the electrical connectors clip onto the bulb cluster holder, the plastic has gone brittle and broken, so the bulbs are loose and not making good contact. Does anyone know where I can get the connectors from, or a good way of fixing the current ones. Thanks.