Robin,
Iirc you looked up the laws when you started to think about DRL for yours. Can you remember what the law states?
....That's quite a contentious issue! T_T and myself have had endless debates about what is law and what isn't re DRL's. To try to clarify, I did a large amount of research on the internet and found lots of very extensive reports and studies, mostly done at national level and including surveys of public opinion. Unfortunately I didn't keep copies I could refer to now and I came across them through surfing from one piece of info to another. Some of this information I found did include what was law in particular countries. I didn't expect to have to later defend my actions!
At the time, about 2 years ago, the UK studies/research was finding that there was substantial public resistance here - Mostly due to Volvo headlight associations and motorbikers at least very understandably objecting if DRL's were at headlight height. I don't know of any specific laws about DRL's in the UK but that doesn't mean there aren't any. Certainly, to comply with some European countries (countries in Europe and not necessarily EC) they need to operate as mine do.
Currently, I think mostly due to German cars being imported here with oem DRL's, the British public have become much more aware of DRL's and I remember reading in the studies and proposals that there would be a transition period before laws were finally in place in which even the use of foglights might be allowed! Personally, I believe strongly that DRL's should be both dedicated units and LED because that type of light functions far better for daytime running - Hence my dislike of the Mk6 Golf and similar solutions. IMO they should be as the Golf and Rocco R's.
My purpose in research was to ensure that whatever I did wasn't going to get me into trouble and so I followed Hella's installation instructions. My VW dealer was happy to connect them differently but agreed that I was doing the most sensible thing.
HTH