Yes it was the bottom small hose ..have had to take it back again as the hose wasn't sealing properly and lost all power again yesterday, put the hose back in and it was fine again so looks like it needs a stronger clip holding it on !
the clips on that peice or different sizes, i had the same problem with mine, a garage got them the wrong way round, the bigger of the two will hold either end, but the smaller will only hold one end if you know what i mean.
IIRC the larger one goes on the drivers size (furthest away from the intercooler if you follow the pipe)