But they need play no part during the GE itself. Just make a pure remain play for Remain voters, and watch the votes pour in.
Think bigger. Aim to vacuum up ALL the Remain votes with an unequivocal stance. Get in early enough and Labour become me-too.
/ENDS
2010 LD vote: 6,836,825
2017 LD vote: 2,371,910
but
2016 Remain vote: 16,141,241
Even if we are pessimistic and assume zero new Remain voters, that's nearly 9,300,000 potential extra votes to chase, even compared to 2010.