2:-

92) [defines surrender to custody as ] . . . in relation to a person released on bail, surrendering himself into the custody of the court or of the constable (according to the requirements of the grant of bail) at the time and place for the time being appointed for him to do so.

4:-

(1) A person to whom this section applies shall be granted bail except as provided in Schedule 1 to this Act.

Schedule 1

2 The defendant need not be granted bail if the court is satisfied that there are substantial grounds for believing that the defendant if released on bail (whether subject to conditions or not) would --

(a) fail to surrender to custody, or

(b) commit an offence while on bail, or

(c) interfere with witnesses or otherwise obstruct the course of justice, whether in relation to himself or any other person.

6

(1) If a defendant falls within this paragraph he may not be granted bail unless the court is satisfied that there is no significant risk that if released on bail, whether subject to conditions or not, he would fail to surrender to custody;

(2) Subject to subparagraph (3) below the defendant falls within this paragraph if --

(a) he is aged 18 or over, and

(b) it appears to the court that having been released on bail in or in connection with the proceedings for the offence he failed to surrender to custody.

(3) Where it appears to the court that the defendant had reasonable cause for his failure to surrender to custody he does not fall within this paragraph unless it also appears to the court that he failed to surrender to custody at the appointed place as soon as reasonably practicable after the appointed time.