DS had a tilted fabric rocker that he loved sleeping in (for naps, not overnight) and I think the angle really helped his reflux. I've saw the nap nanny www.napnanny.com/ raved about on blogs (mainly outside UK) and thought it might be something that would work for dc2. However, when I googled it to find UK stockists I came across things like this www.babycenter.com/204_nap-nanny-baby-recliners-recalled-after-childs-death_10336047.bc The issue seems to be incorrect use (using it in cots) but would you risk it? I wouldn't want to do anything that would put dc at risk. From what I can gather, all issues are linked to incorrect use which is, presumably, like using cot bumpers/ duvets etc for young babies- surely if you follow instructions it would be ok? 
Searched on here but can't seem to find any threads on it.