How do I make complaints in Clydesdale Bank?

A client can make complaints in Clydesdale Bank in one of the following ways:

1. by calling 0800-345-7365 on Mon-Sat from 8 am to 9 pm, on Sun from 10 am to 5 pm
2. filling out the online complaint form
3. posting to Customer Assist Team, 1st Floor Guildhall, 57 Queen Street, Glasgow, G1 3ER
4. visiting the nearest branch of Clydesdale and Yorkshire Bank