The seat survived until just before the February 1974 general election, when it was expanded westwards and renamed Brentford and Isleworth.

Granted on 1 September 1932, the borough's coat of arms was: Per saltire argent and gules in chief a representation of St. Nicholas proper in base two bars wavy azure and in fesse as many seaxes (Saxon swords) the cutting edges inwards proper pommels and hilts or.

Crest : Issuant out of a Saxon crown or a phoenix sable in flames proper.

Supporters : On either side a griffin or gorged with a collar gemel wavy azure.

[1] The arms incorporate the emblems which appeared on the seal of the former UDC, which displayed the figures of St. Nicholas in reference to the dedication of the parish church, together with three seaxes from the arms of Middlesex County Council.