Originally Posted by
coasting
i used to say passing on left and then realised people veer left. now i either say nothing and speed up to nip past quickly or say "stay right".
Do this or the option I use on MUPs and the road. Loudly and clearly shout BIKE BACK.
You should also consider your speed and conditions when verbally notifying others. There is a lot of noise out there competing for our hearing.