I found at a well run and xecent looking garden centre, a pretty little lattice with nicely spread out stems on it, a plant called fallopia - which is of course our dear old friend Russian Vine!! Both this and the bluebells should be sold, if at all, with a health of your garden warning on them, but the reality is that many people neither know nor care, and all the vendor is interested in is making money, so why would they worry about it? Just avoid, and tell everyone you know - there are plenty of other invasive and dreadful plants still for sale out there, sometimes through ignorance, sometimes through greed - as in calling Russian vine Fallopia, in the hope that some innocent soul won't realise what they have bought.