I think so; though I can't imagine that the Chawners would be taking the initiative to create a business plan! I haven't seen the advert since - always the way!
In series 1, Sam did talk about starting her own mobile hairdressing business though - so it could be her! Maybe she's found the motivation and enthusiasm to break away from her toxic family, and do something worthwhile?
Oh who am I trying to kid? This is Sam Chawner we're talking about