I don't believe the BTP are part of the 101 scheme. 0800 40 50 40 is the BTP's main number for reporting a crime and general enquiries. 0300 123 2211 is also available for non-emergency general enquiries.If you're not in immediate danger and don't need emergency assistance, you may also be able to call the new non-emergency number, 101. I don't know if that's been rolled out across the whole country yet but it's for reporting crimes to the local police. That would include theft and so on. Whether you would be put through to the BTP or not, I don't know.