Cunard mostly advertise on daytime television such as ITV3 that has a more mature (and as you identify, often wealthy) audience, normally next to adverts for walk in baths and the RSPCA. Viking river cruises and Hertigruten go after similar markets.I assume it was aimed at a narrow ground of well off retired or near retired people, which is a tiny subsection of the people who will potentially use LNER though.