Workers belonging to the TSSA and RMT unions are yet to make a decision but Aslef last month encouraged its members to accept the offer. A union has voted to accept a pay offer from ScotRail after negotiating a “significant boost” in wages. Unite said on Tuesday that its 300-plus members employed by the railway operator had voted to accept a pay rise of 4.5%, backdated from April for a year, by 91%. Unite is the first of the rail unions to decl…