I have been trying to find out where South Rock is. The best indication is here. Sadly there is no photo coverage in the sea from Google (maps or earth) which is a shame. But I guess the cost of satellite coverage is too high to cover rocks in the sea.
This is the only picture I can find. The original lighthouse on the rock is from the 18th century.
To see the light close up look here
See the BBC report on the removal of the ship from South Rock here and the interview with the head of CIL here