evidence: § Mr. William Ross (Londonderry)(by private notice) asked the Prime Minister what action she will take following the destruction of a vessel in British territorial waters namely Lough Foyle and if she will make a statement. [...] § Mr. RossWill the Under-Secretary assure us that there will be an increase in security forces activity in Lough Foyle? Will he agree that the owners of this vessel should have it brought to notice that the United Kingdom is responsible for compensation for any loss suffered? Will he assure the House that the United Kingdom will shoulder its responsibilities and ensure this time that it is members of Her Majesty's Forces who search and clear the wreck of any further explosives? Will he assure us that the United Kingdom will be responsible for keeping the shipping lane clear and safe? Finally, will he tell the House which RUC divisional commander is respondible for the investigation and that he will not rely on the police force of a foreign country? § Mr. ScottThe RUC, of course, is concerned about this incident. Compensation is a matter for the Department of Trade and the Northern Ireland Office. We will obviously bear in mind what the hon. Gentleman said. On jurisdiction, Lough Foyle is an integral part of County Londonderry, and thus of the United Kingdom. On future security, we are of course already in touch with my right hon. Friend the Secretary of State for Defence whose responsibility this is.