You can now set a weight cap on order that are fulfilled via Royal Mail.
You can set a weight cap per shipping service.
Please follow the steps outlined below to enable this feature.
Select shipping-> shipping courier set up-> set up Royal Mail
Next select shipping services-> under the header 'other settings' select edit.
The below window will then appear, from here you can enter the maximum weight allowed for this service code, you can also specify the weight unit. As default the weight unit will be set to Kg.
If you have already entered the weight at the product level this weight will be used as long as it doesn't exceed the maximum weight entered here.
If no weight has been entered at the product level then the weight entered here will be applied.