P209 CEEFAX 209 Wed 3 Feb 21:00/11       Ferry services throughout Britain have been seriously disrupted by a strike by the National Union of SeamenN An NUS spokesman said 50 vessels, nearly 100 per cent of the active UK ferry fleet, had been haltedN P&O and Sealink have been told that thfir High Court hearing against the NUS for defying a legal ban on the strike can take place tomorrowN NUS leader Mr Sam McCluskie is to meet the management of the Isle of Man Steam Packet Company, whose sacUhng of 160 men led to the dispute, tomorrow.  Ferry news BBC1 168