So Jeremy Corbyn, promised in the Labour Manifesto, to end tuition fees. He later said in an interview that the level of existing student debt was unfair and in a low key aside said that he "would deal with it". I interpreted that as meaning if Labour was elected they would look into the problem of student debt. There was no formal pledge or manifesto promise to wipe out the debt. As labour is not in government, they can't have broken any pledges anyway. They still intend to end tuition fees if they are elected.
Meanwhile, the Tories were (just about) re-elected and proceeded to abandon numerous pledges from their Manifesto. Dementia tax and winter fuel allowance being means tested come to mind. Look at the Tory manifesto!