As well as this...
There's also the argument that not wearing a helmet makes you less likely to be involved in an accident, thus reducing your chances of being hurt. Other road users show more consideration to helmet-less cyclists, and people are shown to take fewer risks when they think they...
https://www.highwaycodeuk.co.uk/using-the-road-overtaking.html
167
DO NOT overtake where you might come into conflict with other road users. For example
approaching or at a road junction on either side of the road
The junction itself is why you shouldn't overtake.