Great news, but like shutting the door after the horse has bolted!
Had this email from my Euro tunnel account:
We would like to inform you that the UK government is introducing Exit Checks at all ports and airports from Wednesday 8th April 2015. The government requires Eurotunnel to gather information on the identity of every person leaving the country via the Channel Tunnel and pass this information to the UK Border Force.
Just hope they are active checking incoming as well!