Premium Bank Staff, PAs & Clients - Demanding Customers & Bank Perks

Do I have any current or former premium bank workers (or personal assistants working for high-net-worth individuals) with experience of dealing with very demanding customers? Or do I have anyone with an account at the likes of Coutts, Hoare, Weatherbys making use of their customer perks? If so, I'd love to hear from you for a national newspaper. Please DM for more info.