25 May 16
A competitive pool of 22 players will battle it out to represent Great Britain at the U20 European Championship Division B in Greece this summer.
Southend-born Joe Hart hit three three-pointers on his way to 11 points while Raphell Thomas-Edwards added nine points for the winners.
Afterwards, Great Britain coach Doug Leichner praised the team's ability to perform when it mattered: "Today we kept our composure and didn't look past this game, the players played in the present which we have been talking about all week.
"Hungary gave us problems, they are very well coached. I am proud of our guys for digging in and getting the result."
Great Britain had got off to a solid start and a three from Hart gave the Brits a 5-2 lead. The Hungarians fought back through their leading scorer in the tournament Rosco Allen and at the quarter's end, Hungary enjoyed a 20-13 lead.
Showing no signs of being rattled, Great Britain hit back in the second period. Back-to-back buckets from Reading Rockets' guard Lewis Champion-Alleyne pulled the gap to 20-19 and off a Hungarian turnover, van Oostrum scored to give GB the lead again.
The Brits held their counterparts to just eight points in the second and led by van Oostrum's 14 points, Great Britain led 35-28 at the half.
Baskets by Thomas-Edwards and van Oostrum extended GB's lead, for the first time to double-digits before Hungary struck again in the third quarter, but the Brits were in firm control of proceedings and enjoyed a 56-44 lead heading into the final quarter of play.
Great Britain began the fourth slower, turning the ball over on numerous occasions, as Hungary narrowed the deficit to 57-50. Much needed free throws from Thomas-Edwards gave GB a nine-point cushion before the Hungarians pressed once more.
GB's lead shrunk to just a point with 20 seconds remaining before van Oostrum kept his cool from the foul line in the final seconds to secure victory.
Allen led Hungary with 13 points.
For full box score click here.