Issue deleting forms

I've just updated a site to Perch 3.0.10 and I've got a role set up where the users can view and delete form responses in the form app.

This is a screenshot my client has sent me: https://www.dropbox.com/s/5lwkxfe3wrul6ny/Capture.JPG?dl=0

They don't have 'delete' buttons any more. I've checked my access and, as a Primary Admin I can see the buttons ok: https://www.dropbox.com/s/aytw56ut8jgkh6s/Screen%20Shot%202017-10-09%20at%2011.26.28%20am.png?dl=0

I've got a test user set up, have given them the same access role and have tried turning a bunch of options off and on to see if anything works but no luck. I'd've guessed it'd be the 'Delete forms' option under 'Forms': https://www.dropbox.com/s/yf0cwe71z1dnkyn/cms-core-users-roles-edit--id%3D5.png?dl=0

Do you know if it's me checking the wrong thing or could it be a wee glitch in Perch that's stopping the Delete buttons appearing?

Thanks for taking a look :)

Martin.