Yes it was Hannover Street; never seen it myself but the B25s were the subject of a documentary (B25 Mitchells do fly in IMC) and they ended up at Blackbushe amongst Doug Arnold's collection - whether he actually bought them I don't know but I do know he already had problems with customs for importing some T28s as they were classed as 'munitions of war'.
They're actually parked on an apron, it was much wider before that bulldozer got to work on it!(Photo taken from the old Control Tower.)