Juts watched it again, he doesn't actually set a date for returning to work, just that you should be actively encouraged to do so, then straight away says the rules for unlimited outdoor activities starts on Wednesday, although the chart gives the impression these will happen on the same day.
I watched it and I suppose it was intentionally vague because going outside and dealing with this virus is not a precise science. It wasn't a brilliant speech in fact it was pathetic because it gave no sense of empowerment, was riddled with slogans, false sentiment and pre-programmed body language. In short it was patronising and did nothing to ease the hysteria - although if somebody hasn't even a vague idea as to what puts them at risk the mind boggles. It should have focused and shown what businesses who have worked through the virus have done (just to help reassure people). Rishi Sunak will soon annouce in detail what the phasing out of furlough will entail - cue more panic.