Their website says the are processing both C-41 and E-6 aswell as B&W:

Can you accept color films?
Yes, we can accept C-41 color negative and E-6 transparency films too. However, color films are not printed to ILFORD black and white paper, but instead printed on Kodak Royal Paper.

Source: http://www.ilfordlab-us.com/page/83/Film-FAQ-s.htm