Women will no longer face prosecution for aborting their own baby under changes set to be passed by MPs next week that would herald the biggest overhaul of abortion law for half a century.

Under the proposals abortion would effectively be decriminalised and women would no longer face prosecution if they ended their own pregnancy after 24 weeks or without approval from doctors.

The changes are said to have the backing of more than 130 backbench MPs meaning it is likely to be approved when MPs are given a free vote on amendments to the Crime and Policing Bill next week.

Six women have appeared in court in the last three years charged with ending or attempting to end their own pregnancy outside abortion law - a crime with a maximum sentence of life imprisonment.

Last month Nicola Packer, 45, was acquitted of taking abortion medicine at home when she was about 26 weeks pregnant. Under the new proposals she would not have been prosecuted for this.