Not sure why you think they are illegal Keith. I had the CANBUS friendly ones with integral resistors mentioned by John above. Since then I changed the front indicators to switchback LED's giving white sidelights switching to flashing amber. No MOT issues.The bulb holders have to be changed to the twin contact stop/tail type though.
![[Linked Image]](https://i.imgur.com/ZTCNrhd.jpg)
Thread
here.
Oh and stay well clear of ballistic resistors

That makes a lot of sense Richard.
For those of us stuck with halogen bulbs (unless we convert to LED specific reflectors and bulbs) that gives an extra illumination at the front end, and I think many of us would regard that as a very good thing.