A community is marking the first anniversary of Britain's worst refinery disaster for four decades in which four people were killed.

Julie Jones, a 54-year-old grandmother, grandfather Dennis Riley, 52, father-of-seven Robert Broome, 48, and Andrew Jenkins, 33, a father of young twins died when a blast ripped through Chevron Oil Refinery in Wales.

A fifth person was also seriously injured in the incident near Milford Haven on June 2 last year.

Maintenance work had been carried out on a 730 cubic metre storage tank which exploded at about 6.20pm damaging an adjacent vessel.

The tight-knit community based at the mouth of the River Cleddau in Pembrokeshire will remember those lost in the tragedy.

A year on from the incident the families of the four victims have spoken of their loved ones.

Jane Summons, partner of Mr Jenkins, from Milford Haven, said: "June 2nd 2011 will always remain one of the darkest days that my family and I ever had to endure.

"To fully convey the impact of Andrew's death upon all of our lives is an emotionally overwhelming experience and understandably, somewhat impossible to explain."

Jack Archer said the past year, since losing his mother Mrs Jones, from Pembroke, has been very hard for all the family.

"My mother was from a large family and was a devoted mother, grandmother, sister and auntie, who was much loved and we all miss her very much and think of her all the time," he said.