The Serious Fraud Office has published on its website a guide entitled 'Approach of the Serious Fraud Office to dealing with overseas corruption', which outlines the guidance available, see the following link:
http://www.sfo.gov.uk/media/28313/approach%20of%20the %20sfo%20to%20dealing%20with%20overseas%20corruption.pdf
In addition, the Crown Prosecution Service has legal guidance for prosecutors in relation to prosecuting offences of bribery and corruption. The guidance is published on the CPS website and is available at
http://www.cps.gov.uk/legal/a_to_c/bribery_and_corruption/
There is also prosecution guidance on corporate offending, which has relevance to bribery and corruption offences, and is available at:
http://www.sfo.gov.uk/media/65228/coml%20joint%20 guidance%20on%20corporate%20prosecutions%20for%20 publication.pdf
The Serious Fraud office has received helpful feedback on the guidance including offering assistance as it embeds and develops.