1 - Sign up to the website here: https://www.portsmouthhc.co.uk/signup
(And click the link emailed to you to confirm your email address - and make sure you select to receive emails!)
2 - Download the 'Pitchero Club' app from your app store.
Click to download the app for Appleor Android.
3 - Once logged in to the app, update your availability using the schedule page, accessed by clicking the calendar icon on the bottom bar.
For those that have already done all three. Thank you!