The passengers of a cruise ship retracing the route of the ill-fated liner RMS Titanic are to hold a memorial service when it reaches the spot where the ship sank on its maiden voyage a century ago.

About 50 of the 1,309 passengers on board MS Balmoral have a direct family connection to the sinking.

The Balmoral left Southampton on Sunday for a 12-night cruise to commemorate the centenary of the sinking of the liner that hit an iceberg on its maiden voyage.

A spokeswoman for the cruise said when the clocks reached 11.40pm on the ship - the time the Titanic hit the iceberg - the captain would make an announcement and the names of those who died would be read out.

One hour and twenty minutes later, a Christian memorial service will be held.

Patricia Watts, 81, a retired teacher from Bristol, who is travelling with her husband David, 80, will be remembering her grandfather, George MacKie, from Southampton, who was a second-class steward on board the Titanic.

She said: "When we get to the wreck site there will be some sadness, but I think also some sense of release.

"I shall feel a sense of accomplishment that I have achieved what I set out to do. I think the service will be a very memorable occasion, slightly sad, but also for a lot of people it will be the event of the cruise."