Labour pledges 1 million new homes, but is this enough?

The Guardian has reported that Jeremy Corbyn is pinning "Labour's election hopes on housing reform pledges". The party wants at least a million new homes to be built over the next five years. This sounds encouraging but it should not be forgotten that, just last year, the House of Lords Economic Affairs Committee said that we need to be building 300,000 homes each year to tackle the housing crisis