Question: what to update after name change?
Answer: Top Priority! Driving Licence. Fill in form D1 with the DVLA. Car insurance policy details. ... 
Utilities. Local council (council tax) Water supplier. ... 
Amenities. Doctor. Dentist. ... 
Finance and other insurance. Bank/building society. Credit card companies. ... 
Online. Online shopping accounts. Especially accounts that deliver items to you eg.