NEW: Gvt has issued the official call-up for military reservists to be on standby to help in the event of a "no deal" Brexit.

Gavin Williamson announced in Dec that 3,500 troops would be held "at readiness". 10% will be reservists.

Here's the WMS today from Mark Lancaster - pic.twitter.com/xzh7QS5KUn

— Lucy Fisher (@LOS_Fisher) January 17, 2019