Mr Roberts, a motorcycle enthusiast who was driving his car from the direction of Betws-y-Coed on Tuesday, says he "felt obliged" to raise the alarm
after coming across the new grid which was recently installed as a replacement for an older version.
He didn't have a VHF radio or flares, or even a mobile phone with him to raise the alarm
It is claimed he saw the man fall in but took 30 minutes to raise the alarm
However, a female bar worker and three customers at Old Hill Cricket Club managed to break free and raise the alarm
shortly after 1am on Sunday morning following the raid.
Police were called to Tranmere after the woman fled to a neighbour's house to raise the alarm
Incident commander Paul Wattling, of Foleshill fire station, said: "It's a good job the occupant was in to raise the alarm
The man swam ashore to an island before managing to reach other people to raise the alarm
He added: "The flat did have a smoke alarm and it is important people have these to raise the alarm
A pal who was also overcome by the wave, but managed to swim back to shore and raise the alarm
, escaped uninjured.
The youngster instantly leapt into action, dropped his bike and ran to a next door neighbour's house to raise the alarm
The bells, which go on bags and purses, jingle and raise the alarm
if someone tries to tamper with them.
Mr Rowlands dashed to raise the alarm
as they started firing at the ship, shattering windows before motoring off.
Nigel Sowden, a fire service station commander, said: "It's very fortunate that this incident occurred at the time it did because usually a smoke alarm would be used to raise the alarm
The youngster was the first to raise the alarm
when a blaze broke out at his home in Hengoed Hall Close, Cefn Hengoed at around 9.
THERE'S a lesson to be learned from the tale of the Los Angeles Zoo employee who was forced to resign after failing to raise the alarm
about Gita the elephant, who later died: Dereliction of duty while in employ of the city only matters when the victims are of the nonhuman variety.