IIRC the ECB or whoever runs the Test side nowadays told us and Foakes that they wanted him to get more F/c experience. This was around the time, again IIRC, that our then Chairman made it clear that no way was he going to argue about anything with Fozzie. So Foakes moved to Surrey.
The good bit is that he started with us, so we still get some money from the ECB for encouraging him. As we do with Topley Jnr, and would with Mills if he ever played representative cricket again.