Nobrot.  Yes, Planters Estorach is the one.  Don't know which road Nigel's on ?  There's more than one way to get there but the most straightforward I've found is to go down the dual carriageway from the end of Generallitat towards L'Aldea.  The roundabout you're looking for has a big water tower by it and you can see a yellow tower with Roig painted on the side.  It's where you go for your ITV test.  Turn off the carriageway here and hang a right (Avenguda del Japo).  Go straight down until the last but one turning on the left.  There's a building with CADO in red on the side on the corner.  This takes you down into Campredo village.  Keep heading straight down (apart from a small kink).  Go as far down as you can until you get to the station and railway crossing.  Cross the railway and then the canal.  Turn right (hug the canal).  Estorach is just under 1K further on, on the left.  It's opposite some big sheds with rust colour painted roof and side panels.  There's a small car park in front and a smart looking shop front (white and green).  Nearer Tortosa is a place for great seed potatoes if anyone's interested.