"In the circumstances you have been required to accompany me/remain here for the purpose of providing a sample of your blood for analysis pursuant to Section 55BA (2) of the Road Safety Act 1958.
If you refuse to do so you may be charged with this offence and if convicted, you may be fined and will lose your licence for a minimum of 2 years.
Do you understand that?
Will you now accompany me to________________/remain here for the purpose of providing a sample of blood for analysis until that sample is taken or until a period of 3 hours has elapsed from the time of the accident, whichever is sooner?"
If still 'NO' - Offence of 'Refuse to Accompany/Remain' is complete and a charge should be laid for that offence.
"What is your reason for refusing to accompany me/remain here for the purpose of providing a sample of your blood for analysis?"