Surprisingly few people are not granted bail.
CPS Legal Guidance, look at the sections on General Right to Bail and Exceptions. www.cps.gov.uk/legal-guidance/bail
"xclusions to the right to bail
The general right to bail does not apply in the following circumstances:
Murder
The power of magistrates to consider bail in murder cases, whether at first hearing or after a breach of an existing bail condition, is now removed by s. 115(1) of the Coroners and Justice Act 2009. This does not apply to attempted murder or conspiracy to murder.
Where a person is charged with an offence of murder or attempted murder, and has previously been convicted in the UK or court of an EU Member State of an offence of murder, attempted murder, rape or a serious sexual offence (as listed in s. 25(2) of the Criminal Justice and Public Order Act 1994), he shall only be granted bail where there are exceptional reasons, which justify it.
Section 114 of the Coroners and Justice Act 2009 amends Schedule 1 to the Bail Act 1976. Section 114(2) provides that bail may not be granted to someone charged with murder unless the court is satisfied that there is no significant risk that, if released on bail, that person would commit an offence that would be likely to cause physical or mental injury to another person. In coming to that decision, the court must have regard to the nature and seriousness of the offence, the suspect's character and antecedents and his record in relation to previous grants of bail.
Manslaughter and Serious Sexual Offences
Where a person is charged with an offence of manslaughter, rape or a serious sexual offence, and has previously been convicted in the UK or court of an EU Member State of an offence of murder, attempted murder, rape or a serious sexual offence (as listed in s. 25(2) of the Criminal Justice and Public Order Act 1994), he shall only be granted bail where there are exceptional reasons, which justify it.
Note: Where a person charged with one of the offences referred to above has a previous conviction for manslaughter or culpable homicide in the UK or EU court, he shall only have his right to bail restricted where he received a sentence of imprisonment or detention upon conviction.