According to The Sun, the couple have only gone and built a recording studio in their house and so have to make use of it by recording — what else — dubstep.
Sarah said: "It’s nice to try things out at home so Mark and I have been in our studio together recently."
“We’ve had Benga and Scream [WE THINK THEY MEAN SKREAM — CONSONANT ED] in there. When we play London we’ll have a catch up with Example too.”
This probably won't amount to much will it, but it's nice to know.