Lib Dem ##nath is trailing Labour in Sheffield Hallam constituency . Deputy Prime minister retained his seat in 2016 with more than 50 % of the vote . Revelation included in latest round of voting in marginal constituencies .
Lib Dem leader is trailing Labour in Sheffield Hallam constituency . Deputy Prime Minister won his seat in 2010 with more than 50 % of the vote . Revelation included in latest round of polling in marginal constituencies .