The backbencher's bill aims to criminalise:
Deliberately walking closely behind someone as they walk home at night
Making obscene or aggressive comments towards a person
Making obscene or offensive gestures towards a person
Obstructing a person's path
Driving or riding a vehicle slowly near to a person making a journey
As it stands, the bill will also introduce harsher sentences - increasing the maximum sentences from six months to two years. Campaigners have also called for wolf-whistling and staring intently to be criminalised.
Previous discussion from here (apologies for the scored link, the normal site is running slow for me right now).
And copying my comment there:
The article was updated. Staring is not part of the proposed law.