I worked as an IT Manager at VCH from 1997 until we were moved out in 2005. We were based in the Admin building, which along with the MHRC were the oldest parts of the site.
There was a large and deep service duct which ran under the full length of the Admin building from South to North, this was filled in when the Admin building was demolished, it then turned East and ran in the middle of the space between X-Ray and Physio and further East between MHRC and Ward 4, ending just short of the Hospital Store. This duct carried fibre and copper cable, BT phone lines, piping, etc into the various buildings.
The duct used to flood quite regularly and when the site was being prepared for major demolition in about 2002/3, the Eastern end of the duct, between MHRC and Ward 4 was found to be full of asbestos, this was removed by a specialist company.
The mortuary was connected to the main drainage system but not to the main service duct, this area is now part of the Walk In Centre.