My vans started pulling to nearside? well if you let go of the steering wheel the bus starts turning to the left?
What's a little more worrying is it takes a lot more effort to steer to the right now compared with the left

I have only noticed this problem today after going to the garage Sunday to inflate the tyres on their new pay as you fill air line

Thanks for your help [much appreciated as I've not encountered this before]
Brian.