http://underworldlive.spinshop.com/
Saw this from the band's Facebook post today:
'
Roll up! Roll up! We have now updated our shop with some great new t-shirts, bags, posters and a exclusive set of 3 art prints by tomato… Available here: http://underworldlive.spinshop.com. While your browsing there’s some great music still available to listen to for free, the 6mix is available for another 12 days (http://goo.gl/zwJRsr) and Underworld’s Maida Vale session is up on the iPlayer for another 10 days (http://goo.gl/nd0bqq)'
There are some t-shirts with the Royal Festival Hall date on the back, but only a small if wanting a Men's shirt.
There's also totebags, and a Royal Festival Hall poster. The Tomato prints listed are pretty pricey though.
=Jason