Ken Livingstone and Crossrail funding

I think we have just found a key part part of Boris Jonson's election video campaign, it's Ken Livingstone being caught out over Crossrail. Watch this video courtesy of Burning Our Money




Why do some politicians say one thing one week and another the next and then try to pretend the two are not irreconcilable? Why do their supporters go along with the charade? Why do the main stream media (MSM) not do more to publicize such slips by Labour politicians? You can bet your bottom dollar they would if had been a Conservative politician.