"Difficulties" with the new contract for interpreting services

http://www.hmic.gov.uk/media/staffordshire-joint-inspection-custody-suites-20120927.pdf 
"There were some difficulties with a new contract for interpreting services for non-English speaking detainees..." (page 9)
"Staff at Stoke said there was a good face-to-face interpreter service available to facilitate investigative interviews, although, under a new contract, there were sometimes delays in obtaining interpreters in person and on the telephone for a particular language." (page 24)