Yes there are some good consumer protection measures under EU law, Baz. But interestingly those you quote are not among them. The UK’s Health and Safety at Work Act (which covers most of the measures to protect workers) was introduced in 1974, just a year or so after the UK joined what was then the EEC and eighteen years before the EU was born. The principle protections for travellers (ABTA and ATOL) are similarly nothing to do with the EU. ABTA (Association of British Travel Agents) is an entirely British affair and was formed in 1950. ATOL (Air Travel Operators’ Licence) protection is a UK scheme provided by the Civil Aviation Authority and has been in force since 1973. So the EU does not have the monopoly on the provision of travel protection schemes.
To answer your question, all EU directives are incorporated into UK law by the Westminster Parliament. There they will remain when the UK leaves the EU. It will then be up to the UK Parliament to decide which to keep and which to repeal.
But all this is beside the point. The issue which needs to be taken on board is not that a few EU Laws may or may not be beneficial to the UK. They have all been drafted with the needs and requirements of 28 different nations to accommodate. They have been drafted by unelected officials and passed by a Parliament where the UK has only 10% of the votes and where it is constantly outvoted. The principle aim of Brexit is to restore absolute sovereignty to the UK Parliament. This was made absolutely clear by the Leave campaign (and somewhat glossed over by the Remainers). As I have demonstrated above, it is not necessary for the UK to succumb to a foreign power to have suitable workplace and consumer protection (or indeed any other) legislation in place; it is quite capable of enacting its own. More importantly such legislation can be tailored solely to the UK’s needs. Of course some people, such as haggisdj, are quite happy to see their Parliament's law making powers ceded to an unelected foreign authority over which they have no control rather than trust it to “Tory Toffs” whom they can dismiss. Fortunately for democracy that viewpoint did not prevail last week.