Running the repeater sites and networking for them costs Matt (G7HMV) and Adam (M7SMI) a chuck of change each month.
This includes site rent, 4G/Broadband access and Electricity costs, although never required help towards the costs is always appreciated.
Below is a PayPal donation button (Link included in case button stops working) which will take you offsite and directly to a secure PayPal page where you can donate to the running costs.
https://www.paypal.com/donate/?hosted_button_id=45Q5GSHX62HVQ