A man who accidentally killed his brother in a high-speed boat crash is renewing his calls for a crackdown on drink-drivers on the second anniversary of the tragedy.

Cliff Langan will today place flowers on a plaque at Brighton Marina for his older brother Ian Langan.

Ian, 45, died when his boat was hit by a powerboat driven by Cliff just south of Brighton's Palace Pier.

An inquest jury ruled that Mr Langan had been unlawfully killed, after hearing Cliff had been drinking that afternoon.

After the death, Sussex Police arrested Cliff Langan and Glenn Mckay, who was driving the boat carrying Ian, but the Crown Prosecution Service found there was insufficient evidence to prosecute.

Cliff, 46, of Neptune Court, Brighton Marina, has since given up alcohol and campaigned to raise awareness of sea-safety - including a call for every boat to carry lifejackets.

He held an inaugural Sea-Safety Awareness Day at the marina a year ago, featuring the unveiling of the plaque, but has scaled down further events after wrangles over costs.

He is lobbying for tighter alcohol limits than the ones introduced by the Government last March, which applied only to professional rather than leisure sailors.

He has discussed his concerns with Brighton Kemptown MP Des Turner, and wants compulsory licences for sailors and volunteer police forces at marinas.

The Alias Hotel Seattle at the marina is flying a flag bearing the red-and-yellow sea-safety symbol this week.

Mr Langan said: "The objective of the flag is to remind people that certain laws to protect themselves and others from danger are still not in place.

"Will it need another Mayday to be called for the laws to change?"