P115 CEEFAX 115 Sun 3 Apr 20:47/45       P&O seamen have voted to continue their strike which has disrupted cross- Channel ferry services. The seamen voted at a mass meeting at Dover to reject the company's latest offer, in line with the recommendation bz the National Union of Seamen. Mr Graham Dunlop, managing director of P&O European ferries, said he was disappointed at the outcome. Passengers on other services at Dover have not been delayed, but people have been advised not to attempt to travel without confirmed bookings. Ferry news BBC1 168