Deleted Orders showing in "Order Status" Page

Hi,

I made some test orders and since moved them to the trash. Unfortunately they are still showing in my order - status page. I know this in theory wont impact on my customers but it would be nice to get rid of them completly. That way when im searching for orders Ive raised my page isn't cluttered with deleted ones

You can see real orders with a number and deleted ones with no number

Is it possible to remove the ones with no number please

Kind Regards
Kieran