It's a lovely tray as it goes. Its got like a rippled surface for non slip effect. Looks the business to me, but then I'm no plumber and ain't seen many shower trays.
https://www.tdlonline.co.uk/Bathroo...57-/Ascent-Premier-30mm-Rectangle-Shower-Tray
https://www.tdlonline.co.uk/Bathroo...57-/Ascent-Premier-30mm-Rectangle-Shower-Tray