Google received the highest approval, from the Queen, to allow companies to buy sponsored links for the online gambling in UK. Google stopped advertising online gambling in the search results pages in 2004 after the US Unlawful Internet Gambling Enforcement Act of 2006 (UIGEA) and the express claim of the US [...]

Yahoo! changes his terms of service regarding the gambling  ads, for the UK advertisers. This is due to the change in UK legislation for gambling advertising, that is now less restrictive.
AccuraCast says that Yahoo! sent an email to its UK clients telling them that under recent UK legislation on gambling advertising, [...]

It seems that Yahoo! already started the campaign against online gambling. For a search with the keywords “online gambling”, the first two positions belong to a same site that was shuted down by the web hosting company for the violation of the ToS:
#1:
Site Status Message
Site Shut Down. www.xanga.com. gambling72’s site has [...]

All the three companies have agreed to pay a total of $31.5m (£15.7m) to settle claims that they accepted online ads promoting illegal gambling, during the last ten years.
Microsoft has to pay $21m, part of it as a charitable donation to support exploited children ($4.5m to the International Center for Missing and [...]