As their reply says "Thames Valley Police can confirm that all Chief Officers have remote and secure access to emails and other appropriate Thames Valley systems."
The cost per person is about £20 a year for "secure access". (Plus £582 for the laptop itself.)
You may like to recall that the interview with the Oxford Mail published on 13/5/13 said:
Yesterday he [PCC Anthony Stansfeld] said he needed to have the base at Hungerford to access the force’s computer system and store secure documents and that it would be “very expensive” to set up a secure computer at his home.Later that week, Mr Stansfeld did not use that same reason (in bold above) as part of his explanation for why he needed the second base in Hungerford. Instead he said that he needed a place to download and print off confidential items. (His oral statement to the Police & Crime Panel on Friday 17 May is now online - I recommend that you read it.) Here is a quote from it:
The PCC attends meetings at which confidential material is considered at various locations (e.g. Kidlington, London, etc). Accordingly, he must take confidential material between and outside both of his offices (i.e. Kidlington and Hungerford) to discharge his functions effectively.