to bring this threead back to life, and in answer to the original question Veritairs BO105 is still in the white, green and red livery and has never been in police livery. it is used as back up for South and East Wales ASU and as Primary Aircraft for British Transport Police. BTP are currently working with Network Rail to secure funding for a year round ASU, rather then the present set up which is about 100 days per year. the BO105 is used rather than the AS355 as the aircraft more often than not has to land in small areas to enable the Police Observer to respond to incidents, such as Fatalities on the railway. the BO105 is much better at helipad T/O than the 355 which tends to be a sod to get airbourne on a warm day.
hope this clears up any confusion, but as for the origin of the police marked BO105 .... ????