Scrap Single Supplement Payments

Think its grossly unfair hotels are permitted to add additional charges for single people. My wife died from liver cancer @ 53. As a result I am charged a single room supplement when I have occasion to stay at hotels. Those married folk in the group are charged the normal rate for a double room, receive two breakfasts, two dinners each day. I am charged around £20 per night additional for a single room with one breakfast and one dinner per day.
This anomaly makes me feel marginalised by the industry and penalised due to my wife's death. My MP has contacted the Hoteliers Federation and the Minister for Arts, Heritage and Tourism. They state while they are aware of the issue, it is primarily a matter for the industry. It would appear there is no body controlling the industry and they are permitted to implement what they choose.
The additional single supplements enforced for travel has discouraged me from doing any form of travel. Great article by Fiona Parker highlighting this issue in Money Mail confirming the ridiculous charges imposed on individuals. Those affected have given testimony to their treatment by travel operators.
I feel there needs to be some regulatory control introduced to change the current status, I don't want to be treated as special due to my unfortunate circumstances, just treated fairly.