Unfortunately Shopify (the software running our online shop) charges multiple shipping fees if buying items from two locations. So if you have items that are coming from the shop and our storage location there will be a double shipping charge. We are unable to prevent this but we REFUND any excess shipping. If your UK shipping charge is greater than £8 then this "bug" is being applied and we will refund you.
Apologies but we have tried everything to get around this and currently there is no way except refunding the over charge.