Like others, I'm not going to do all of the work for you, but I will help you to use Google properly.
Use 'change law' as your search term.
Then, on the Google results page, click on 'Pages from the UK'
On the next Google page (under the date options), click on 'Custom range'.
Enter 1/11/2010 in the first box and 28/1/2011 in the second one.
Then select from the results you see. (There's a promising one about the Bribery Act on the first page of results).
Chris