Complex sentence: The Portway was the most expensive road in Britain when it was opened by the Minister of Transport, Colonel Wilfrid Ashley with the Lord Mayor of Bristol, Alderman Moore, on 2 July 1926, costing £800,000 (now £).
Split into simpler sentences: The Portway was opened by the Minister of Transport, Colonel Wilfrid Ashley with the Lord Mayor of Bristol, Alderman Moore, on 2 July 1926. It was the most expensive road construction project in Britain, costing £800,000 (now £).