Assisted suicide remains a criminal offence in England and Wales, punishable by up to 14 years in prison, but individual decisions on prosecution are now made on the circumstances in each case.
Guidelines were issued in 2010 by the Director of Public Prosecutions Keir Starmer, QC which clarified the position on assisted suicide.
It was indicated that anyone acting with compassion to help end the life of someone who has decided they cannot go on would be unlikely to face criminal charges.
A pensioner and her 25-year-old son have been released on bail after they were arrested on suspicion of encouraging or assisting a suicide.
A Sussex Police spokesman said: "It is an offence to encourage or assist suicide under the Coroners and Justice Act 2009 and officers are investigating whether any crime has been committed or is likely to be committed if they do not take action."
A 65-year-old woman and a 25-year-old arrested on suspicion of encouraging or assisting a suicide are mother and son.
The pensioner and her son were held after police suspected they were planning to take her husband to the Dignitas clinic in Switzerland to commit suicide, according to Press Association sources.
A 65-year-old woman and a 25-year-old man have been arrested on suspicion of encouraging or assisting a suicide.
Sussex Police confirmed the pair were arrested in the Chichester area and it has been reported that they had planned to accompany a 71-year-old man to Switzerland to end his life.
Police are investigating to see if the man is able to decide to travel himself.
A Sussex Police spokesperson said: “The investigation is looking into what steps, if any, the suspects had made in taking the man out of the country.
“If it is confirmed the man had the mental capacity to make decisions for himself then we would not be able to prevent him travelling.”
The South East is the most unaffordable place to live in the UK. Research has revealed that Chichester in West Sussex is the most expensive place to live. Oxford, Guildford and Cambridge are also among the most unaffordable places to buy homes.
The A286 Stockbridge Road is closed both ways. There is queueing traffic after the failure of a level crossing between Canal Wharf and A286 Avenue de Chartres. The level crossing outside Chichester Station is stuck in the down position.
Fifteen teams have taken part in the first Great Sussex Bath Race. The event near Chichester was organised by a man who has climbed Everest and skiied to both poles. Richard Jones reports.
The first annual 'Great Sussex Bath Race' is taking place at a lake near Chichester in West Sussex. Fifteen teams have been building their vessels from scratch to take part in some wacky races.
The Princess Royal is due to visit West Sussex today. It's in her role as President of the Royal Yachting Association. Her Royal Highness will be given a tour of sailing centre in Chichester.