That sounds promising. I also emailed Channel 4 and got this response:
Thank you for contacting Channel 4 Viewer Enquiries regarding PLAYING IT STRAIGHT
We are pleased to hear that you enjoyed this programme and found it funny and entertaining, please be assured that your comments have been logged and noted for the information of those responsible for our programming.
Thank you again for taking the time to contact us here at Channel 4, we hope you continue to enjoy our programming.
Channel 4 Viewer Enquiries
I wanted to do something, however small, to encourage them to commission another series.
Brilliant. I'm thinking I should do this, I'd love a third series. I'm unsure whether all the filming is done during the summer… but two series a year would be muchly appreciated.