By golly I've fixed it..in the process of if disconnecting the first light I noticed a loose neutral in the second one..tightened it up and hey presto.thanks for all your help
Hmm..looked at all the junction boxes .theyre IP65 further protected by pvc sheeting..both bone dry..tomorrow I'll start disconnecting the lights one by one
Hi..I have 3 20w outside led spots connected to 6A RCD..there is a fault somewhere which i haven't looked for but the 6A doesn't trip, its the 63A that trips..any ideas