I have just bought the babydan highchair for my 6m ds from boots.com. The website isn't clear whether it has a high or low back so I queried this with them and got the following reply....
"the picture we display on the site shows the low back highchair. Due to European safety regulations this product has been temporarily removed from sale. We currently only stock the highback chair."
There are quite a few low back ones for sale on ebay and the like so thought I would post incase anyone was thinking of getting one....