Okay, I know that's not spelt right but that's what it sounded like!
Last night on Good Food Live they showed a variety of different cresses, one of them was called 'sheesho' cress, it was Japanese and everyone thought it was really nice!
Does anyone know anything about this, or where to buy it? and what the proper spelling is!

Hi, I am sure it is called Shiso cress and it seems that it is found on many top restaurant menus - probably explains why it is considered 'trendy'. As to where you can buy it, sorry can't help but if it is Japanese then maybe a specialised Oriental grocer could help?

Or being a cress I should imagine it will be easy to grow:

[link]

That site sells seeds for both green and red shiso (Perilla).

Thank you so much for your help Georgie, I didn't really expect anyone to know!