By Ali Lyon A landmark deal with NATO and the ongoing success of long-term agreements in the UK and Australia have helped defence firm Qinetiq to a “good” start to the year. The FTSE 250 constituent, which until recently had largely missed out on the frenzy of gains by many defence firms off the back of Ukraine’s invasion of Russia, said it remained “on-track to deliver high single digit organic revenue growth” when it posts its full year results next year. Order intake performance during the three months to June 30, it said, with revenue under contract for the full year increasing to 74 per c…