The Department suggested that external factors had hindered the programme, noting that new requirements emerged following the EU Exit referendum results in 7 Q 45; C&AG’s report Progress delivering the Emergency Services Network, Session 2017–19, HC 2140, 10 May 2019, Para 5 8 Q 44 9 Q 66 10 Q 49 11 Q 37 12 Qq 66, 67 13 Qq 37, 38; HM Treasury, Treasury Minutes – Government responses on the Twenty–Seventh to the Thirty–Third reports from the Committee of Public Accounts Session 2015–16, Cm 9270, May 2016 14 Q 81 15 Q 67 16 Q 81 10 Digital Services at the Border