Unfortunately we have been having issues where PayPal orders are not going through. Unfortunately while we try to fix this we have disabled PayPal as a payment option and if you placed an order within the last day you may need to place this again. Card transactions should be working as normal. If anyone is having any issues please contact us at Support@Slitherine.co.uk where we will endeavour to help.
Again, we are sorry to all affected and we are working to resolve this as quickly as we can. The Slitherine Team