Also in the UK. Yes, this still applies.
Agreeing to and having a repair done is one thing, agreeing to and having one done that didn't work is quite another as either the item was irreparable or the level of repair insufficient. It does not make sense that anyone, anywhere, could agree to a repair and subsequently it comes back still 'not fit for purpose' and that customer has lost their right to a refund. This watch was not fit to sell in the first place and that is what the measure of the 'fit for purpose' Consumer Rights law is about. Like a pair of shoes that let in water or fall apart after 2 wears, it's only with experience that this could be assessed, it's not something that can be judged by a consumer just by inspection of the product when it was new, unused.
Moreover, this is why watches are usually guaranteed for at least a year. fatcat only had 4-ish months before he recognised that the watch was consistently wrong, in watch terms that's not long, the rest of the year was taken-up with 3 attempts to fix the watch which all failed. That is a faulty watch. I watch that doesn't keep time is a bracelet, fatcat needs a watch and that is what H should recognise, after this experience he shouldn't be expected to have faith in H watches, they should issue him a refund because he now needs to buy a watch that tells the correct time and that means going somewhere else.
Legal entitlements vary from country to country but H overrides not only some national laws when not pressed to comply (I have had to 'press' a few times myself) but also H's own rules depending whichever customer it's dealing with. There is no consistency at H anywhere in the world, whichever country, when customers are treated like reg. human beings and/or allowed to buy something we actually want we're overwhelmed with gratitude and think we must be VIPs. I'm very cross on fatcat's behalf.