It is possible to book a collection with UK Mail during the weekend/s. Here's how:

1. First of all, you need to check with UK Mail if this feature is enabled on your account. 

2. Once you have confirmed that, please go to your UK Mail settings in Shiptheory and go to the Advanced Settings.

3. Scroll down to the bottom, until you see the Weekend Collections option and select the day/s they collect from your place.

If you have any queries or issues with this, please get in contact with support and we'll be happy to help!