Our response to the Which? review of Baby Dunlopillo - May 2019 The Baby Dunlopillo mattress is a new product and was tested by Which? in May 2019, shortly after its launch, using the voluntary British Safety Standard BS EN 16890:2017 The Baby Dunlopillo mattress does comply with the current, mandatory British Standards and carries the relevant BS numbers: BS 1877-10:2011 +A1:2012 and BS 7177:2008 +A1:2011. However, the rigorous testing by Which? revealed concerns with two aspects of the Baby.