Entering onto a single line without having obtained a token, except in some very limited and specific circumstances (which don’t apply here), was regarded as such a serious failing that it was just about the only offence for which dismissal was actually mentioned: ‘A driver will render himself liable to dismissal if he leaves…without the token’ (in the General Appendix, I think). If it is necessary for the token to be used for opening a ground frame or similar, then the driver may hand it to the appropriate person, but otherwise it remains with him. Anybody who has ever worked as a driver, guard, signalman or S&T lineman on a single line understands the need for strict adherence to the rules in this area.