Company is based in Netherlands heavy cost for postage and don't offer a return service so costs in excess of £10 to return the item with royal mail. Given they supply clothing over the internet there is likely going to be plenty of returns.
Reply 21RUN:
Dear Iain,
Thank you for your feedback.
At this point we don't offer free returns yet, which is explained on our website: https://running.shop/returning-your-order We are sorry that this is causing you inconvenience.
Unfortunately, we cannot help you with the costs, but we will fully refund the purchase amount of items that are returned to us.
In case of any further questions, please don't hesitate to let us know - you can always send us an e-mail at info@running.shop!
Best regards,
Running.shop