A civil servant who mislaid classified Ministry of Defence papers that were later found at a bus stop in Kent has been selected to advise on the government’s defence policy review.

Angus Lapsley, Nato’s assistant secretary general for defence policy and planning, will join a team headed by George Robertson, a former Nato secretary general and former defence secretary, along with the former Donald Trump adviser Fiona Hill and Gen Sir Richard Barrons, who ran the UK military joint forces command.

The former Conservative defence minister Sir Jeremy Quin will also assist in the review, which Robertson said was to “deliver a clear vision for UK defence” and “consider the profound challenges facing our country and how they can be countered”.