It was not only the warm weather that kept hundreds of householders in Penarth awake last night – it was also the incessant sounding of a two-tone klaxon alarm.
The sound could be distinctly heard along , Cliff Walk, Penarth Esplanade and by residents of properties overlooking Cardiff Bay – particularly along Paget Road.
Some people thought he noise might have been something to do with last night’s filming on Penarth Esplanade – but that had finished at 04:00 AM this morning – and still the klaxon went on – and on.
Others thought that the criminal gang which has been stealing from vehicles in Penarth Marina might have called around again to their happy hunting ground, but it seems the sound – which persisted for hours – wasn’t coming from a car alarm.
The next obvious suspects were the trio of bascule bridges across the locks of Cardiff Barrage – but they have their sound signals muted at night and in the the early morning and not even the bilingual spoken safety warnings were loud enough to disturb slumbering Penarth.
The rogue alarm appeared to be emanating from somewhere directly across Cardiff Bay – but, as yet, has still not been identified.