Hello Luke,

Thank you for your message.

I can confirm that our trays are trimmable and there are several options for your 1300 x 700 shower area. 

We can manufacture a bespoke tray to match that size exactly. It would take about 10 days and would have higher price but it wouldn't need any extra materials or effort,

• 900 x 1400 tray with central drain, so you can cut it down to size symmetrically,
• 800 x 1200 tray, cutting down to size the 800 mm dimension and extending 1200 to 1300 using tile backer boards, which are made of similar material to what the tray is made of.
• If you can afford waiting, in my opinion it would be the best idea to go for a custom size wet room tray. 

In case of any other questions I will be happy to assist. 

Kind regards

Chris 020 8145 4804