Offcom rules:
Among the key clauses, the rules state that advertisements for gambling must not:
•portray, condone or encourage gambling behaviour that is socially irresponsible or could lead to financial, social or emotional harm;
•be likely to be of particular appeal to under 18s, especially by reflecting or being associated with youth culture;
•suggest that gambling can be a solution to financial concerns, an alternative to employment or a way to achieve financial security;
•exploit the susceptibilities, aspirations, credulity, inexperience or lack of knowledge of children, young persons or other vulnerable persons;
•link gambling to seduction, sexual success or enhanced attractiveness.
That advert is taking liberties with the rules - especially with credulity.