He wanted to ride for Belle Vue, the rules prevented it, he'd already done a deal in Sweden.
Lots of replies to my comment so will reply here, every year theres fan rumores of Dan signing for thier club and every year he signs for Belle Vue, he will do so again imo.
Dan won't gain anything towards becoming world champion by riding Ipswich every week, the days of needing to ride small tracks to be world champion are gone. One of the most techinical tracks in the GP was Cardiff, he won that 2 out of 3 times.