As from April 1st 2014 a new set of Sentencing Guidelines for sex offences is to be used by judges in England and Wales.
The definitive Guidelines relating to the many various sex offences can be seen here:http://sentencingcouncil.judiciary.gov.uk/docs/Final_Sexual_Offences_Definitive_Guideline_(web).pdf
It is a vast document and you will need to scroll down through the various sections.
As regards "Exploitation [of prostitution] and trafficking", the preamble/precis states this:
Exploitation and trafficking
The draft guidelines aim to ensure that those who exploit others sexually for commercial gain get appropriate sentences. The proposals make effective distinctions between those who are running exploitation operations and those who are involved because they have been coerced or exploited. The big players will get the longest sentences and only those very low down in any operation, who may have been coerced, would be likely to avoid a jail sentence.
Offences involving children are particularly heinous and the Council is proposing that even those with a low level involvement in such an offence are jailed.
While we're on this subject of sentencing, let's remind ourselves that by a Bill expected to become law by the end of the year, the maximum penalty for trafficking is likely to be increased from the current 14 years to Life Imprisonmenthttps://www.gov.uk/government/news/huma ... rn-slavery
Guidelines are also being issued to the Magistrates Courts, in another document.http://sentencingcouncil.judiciary.gov.uk/docs/Final_MCSG_Update_10_-_December_2013_(web).pdf
Again, a huge document, there is an Index at the beginning. Scroll through to your area of interest, e.g. brothel-keeping is at Page 291, etc.
Key date for both is April 1st 2014.