REMEDIAL work on the heavily-delayed guided busway between St Ives and Cambridge will fall a further two weeks behind when workers take a fortnight break over Christmas and New Year. With no work taking place over the holiday that means it will not open until 2010. The whole guideway, including the even further-delayed southern section between Cambridge railway station and Addenbrooke's, should have been handed over to Cambridgeshire County Council in February this year with a view to services starting in April. Although the guideway looks virtually complete, it is not yet of a standard that is acceptable to the county council. Nor will it be this side of Christmas, a spokesman said yesterday (Tuesday). Having now missed three projected opening dates for the northern section along the route of the disused St Ives-Cambridge railway line - April, September and November - the council will not offer a fourth date as a further hostage to fortune.