Data Sharing with the DVLA

Currently waiting for a response from Department for Work and Pensions, they should respond promptly and normally no later than (details).

Dear Department for Work and Pensions,

I would like to know what the Data Sharing agreement is between the DWP and the DVLA. Specifically, I would like to know what medical information is shared between the DWP and the DVLA.

Yours faithfully,

Edward