You can't do that there 'ere (boyo)!

Apparently Wales are to ban e-cigarettes anywhere where smoking is not allowed - specifically in enclosed public spaces.  I assume they have the devolved authority to do this, but as there are no official border crossings between England and Wales can't help feeling this is going to cause problems with train or car journeys between the two countries - one minute you can smoke - or vape - and a few yards further on, it becomes illegal.  Surely this would have been better handled by some consultation and an agreed approach between them and us - or is this just Wales being bolshy for bolshy's sake?