In 2005, William Hill bought 624 betting offices in the UK, Republic of Ireland, Isle of Man and Jersey from Stanley Leisure for £504 million: the acquisition briefly took the company past Ladbrokes into first position in the UK betting market The company operates worldwide, employing approximately 16,601 people with main offices in the UK, Republic of Ireland and Gibraltar, offering betting by phone and Internet together with their 2300 UK-wide Licensed Betting Offices.
They are the largest UK operator, representing around 25 per cent of the market throughout the UK and Ireland.
Its telebetting call centres, which are located in Rotherham, South Yorkshire took 125,000 bets on the 2007, Grand National and according to the company its betting shops process more than one million betting slips on an average day.
From 2001 until 2009, William Hill paid George Howarth MP £30,000 pa. While on William Hill's payroll he tabled amendments to the 2003 budget proposing tougher levels of taxation for person-to-person betting exchanges.
In 2018, William Hill was fined £6.2 million by the Gambling Commission for systematic failures regarding anti-money laundering and problem gambling.
The operator was found to have accepted large deposits of cash linked to criminal activity between 20, resulting in £1.2 million in financial gains.
William Hill was ordered to return the £1.2 million profit, plus pay a penalty of £5 million for breaching regulations.
In September 2009, the company participated in the bidding for the first online gambling licence in India, expressing their interest to enter the Indian betting market via the remote Himalayan state of Sikkim.
And later rebranded as William Hill Australia in 2015.
Both Sportingbet and Centrebet were acquired in March of the year for $660m and $132m, respectively, while was brought in during August 2013, for an initial $34m.
In October 2009, the ASA banned a poster and National press advert which promised "£100 OF FREE BETS".
The advert was found to be "likely to mislead" and in breach of a Committee of Advertising Practice code relating to "truthfulness".