As a result, sales material and value proposition had to be updated quickly.

FORBES: How Marketing Impacts Sales Performance

The firm had armed its sales staff with deliberately misleading sales material to use on the doorstep to persuade other firm's customers into switching suppliers.

BBC: E.On UK sales investigated by Ofgem

Guildford Crown Court found the firm's salesmen guilty of using deliberately misleading sales material, in breach of the regulations that protect consumers against unfair trading practices.

BBC: MPs call for energy doorstep mis-selling compensation