THIS picture taken on the afternoon of Saturday, October 31, of a marine survey rig, was submitted by reader Jeff Dyer.

The rig – called Excalibur – is carrying out a seabed investigation exercise for Hinkley Point on the opposite side of the Bristol Channel.

It is drilling investigation boreholes in the Hinkley Point area for eight weeks, moving regularly between planned points.

It is operating 24 hours a day, seven days a week and supported by tugs for manoeuvring.

The jack-up measures 60 metres in length by 32 metres wide.

Mr Dyer said: "The rig went past Lavernock Point and up towards Cardiff. It was accompanied by two large tugs and a support vessel."