Actually quite a bit has changed:
Work: People were being advised to return to work as little as ten days ago. That advice has now been reversed.
Shops: Staff must now wear face coverings.
Transport: Passengers in taxis must now wear face coverings.
Hospitality: Pubs, bars and restaurants must close at 10pm. Only table service is allowed. Staff must wear face coverings as must customers when not seated at a table.
Of all of these the 10pm pub and restaurant curfew is the most bizarre. I cannot see any difference between customers leaving a restaurant at 10pm or at midnight. All it will do is drive people to booking their tables earlier in the evening. I have already done this for Saturday - I usually book for 8pm, leaving around 10:30 to 11:00. So now I've changed that to 7pm, leaving between 9:30 and 10:00.
As far as pubs go, do they really think that Saturday night drinkers are going to leave the pub (where, in most of the establishments I use, anti-social distancing, hygiene and contact tracing are fairly well organised) at 10pm and simply toddle off home to bed? No they won't. They will almost certainly be tempted to "let's go back to mine and watch a film/the football/whatever" where no control will be in place at all. Yet another example of people who legislate having no idea how most of the population behaves.