My cousin who married a Warbutton, his birth registration has MMN of Bush
He also had a couple of sisters with MMN Bush
Found this marriage on line:
Marriage 29 Jun 1929
Parish Church, St, Johns Bedminster.
Walter Warbutton 24, Bach, Window Cleaner of 25 Stafford St..
Father Henry Warbutton, Window Cleaner.
Spouse: Violet May Bush 21, Spinster of same address
Father Henry Bush, Labourer.
Witts: W H Bush & A Warbutton