Yes, Chris is spot on and his link provides all the details.
A little bit more info to help: in the UK it is extremely unusual for somebody to be released on bail with a surety or security (as you will see from Chris’s link there is a difference) being required. You will also see from Chris’s link that all defendants have a right to bail unless the court has substantial grounds to believe that he might:
(a) Fail to appear as directed for the next hearing.
(b) Interfere with the course of justice (in particular approach witnesses).
(c) Commit further crime.
There has to be evidence to support that belief (not just a “hunch”) and even then bail with conditions (to reduce the identified risk) might be granted.
The question of a security or surety would only arise if it was suspected that the defendant might abscond but there are usually other more effective ways to reduce that risk, such as (for example) residence at a specific address, regular reporting to the police, or surrender of passport.