The Ambulance Service in Wales recorded its worst ever figures for response times today.
Only 42% of emergency calls were answered by Ambulances within the target time of eight minutes.
ITV News Wales correspondent Rupert Evelyn reports:
A family which launched a legal bid for the right to sue police for neligence over the death of young mother Joanna Michael has been turned down by the Supreme Court.
Ms Michael, aged 25, of St Mellons, Cardiff, was stabbed to death by her ex-boyfriend Cyron Williams in a "mad fit of jealous rage" in 2009, despite dialling 999 twice.
The court heard that "individual and systemic failures" by police meant the emergency services arrived too late to save her life. She told the operators that he had threatened to kill her, but the message was not passed on correctly and the call was downgraded.
The family had hoped to overturn a ruling given in 2012 which stated that police have an "immunity" from negligence lawsuits under common law for actions by officers during "the investigation or suppression of crime".
However, the Supreme Court judges upheld an earlier ruling that the family could proceed with a claim that their human rights were breached by a police failure to protect Ms Michael's life, despite a cross-appeal by the chief constables of South Wales and Gwent Police.
Williams, 19, was sentenced to life with a minimum of 20 years for the killing, which saw him stab his former partner 72 times.
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A van overturned and seven vehicles slid off the road in Sussex this morning as motorists faced icy driving conditions.
Two men, both in their twenties, suffered arm and facial injuries and were taken to hospital after the accident on the northbound carriageway of the A24 between Ashington and Washington.
Last night was officially the coldest night of the year so far with temperatures dropping as low as -11C in places, but forecasters warn that there may be more cold weather to come.
The Met Office has issued an amber warning for icy conditions across the country including the North, Midlands and East Anglia, until midday on Thursday and MeteoGroup have predicted there could be snow tomorrow or Wednesday.
A message on the Met Office website stated: "Large areas of England will experience colder than average conditions in the coming week, with widespread overnight frosts."
The coldest temperature measured last night was reportedly -11.2C at Loch Glascarnoch, in Scotland, which beats this year's previous record low of -9C on December 27, in Cromdale, Moray.
After a frosty start, it will be mostly dry and sunny although localised fog could persist in some areas.
Some coastal fringes will see cloud with further wintry showers, especially in north-eastern England, although these will gradually ease.
It will remain cold throughout and very cold across snow cover.
Tonight, the sleet and snow will gradually spread into Northern Ireland, and perhaps other far western parts by dawn.
It will be very cold with clear spells elsewhere, with a hard frost and localised fog.
A mixed picture of showers and clear skies across Britain this afternoon - but cold weather will be everywhere.Read the full story ›
Forecasters have warned of severe cold weather in parts of the country, with temperatures in some areas expected to fall as low as -15C tonight and early tomorrow.
The lowest temperatures are set to occur in Scotland, with lying snow, clear conditions and light winds contributing in southern, western and Highlands areas.
Sections of Northern Ireland are also expected to see temperatures fall as low as 7C-9C
The Met Office also predicted widespread frost and patches of freezing fog across much of the UK, with drives in particular warned to take extra care in icy conditions.
Another cold day everywhere, with highs of just 5C and sleet or wet snow in some parts of the country.Read the full story ›