Prime Minister David Cameron is set to meet with advisers on Monday to assess the impact on Britain of the Greek referendum vote.
Votes are currently being counted in the country's crucial bailout referendum on whether to accept an austerity package from EU leaders, with early TV opinion polls putting the "No" vote narrowly ahead.
Chancellor George Osborne, who is due to attend the meeting with Cameron, Mark Carney, and other senior officials, has already said Britain would not be "immune" from the fall-out from the vote.
Speaking on the BBC1's Andrew Marr Show he said: "I don't think anyone should be in any doubt - the Greek situation has an impact on the European economy which has an impact on us.
"We cannot be immune from these developments."
Two people have been killed after separate lightning strikes in Wales' Brecon Beacons.
A statement on the facebook page for the Prince Charles Hospital, where both victims were being treated, said:
Prince George has charmed the public once again after waving and smiling to the waiting crowds who had gathered outside the church where his sister is due to be christened this afternoon.
The toddler, who is nearly two, held his father Prince William's hand as the Royal family made their way up the path to the Church of St Mary Magdalene in Sandringham where Princess Charlotte will be christened.
Prince George was dressed in red shorts and a white shirt with red embroidery for the princess' christening while the nine week-old guest of honour was dressed in an elaborate cream lace and satin royal christening gown.
Counting is now underway after the Greek bailout referendum, with polls predicting a victory for the 'No' vote.
The waiting crowds have had their first glimpse of the new baby princess as she arrived for her official christening today.
Princess Charlotte was pushed to the ceremony in a vintage pram, previously used by the Queen for two of her own children.
The Millson pram was pushed by the Duchess of Cambridge while nine week-old Charlotte's father Prince William and brother George walked alongside.
Princess Charlotte has arrived for her christening, surrounded by her smiling parents and brother Prince George.
The princess arrived at the church in a black pram, pushed by her mother Kate as her brother walked alongside with father William.
George Osborne is set to cut £650 million from the BBC's budget - the amount the Government currently spends on providing free television licences for the over-75s.
The corporation will have to take on the cost of providing the 4.5 million licences - worth £145.50 per person - the Chancellor suggested on BBC1's The Andrew Marr Show.
"The BBC is also a publicly funded institution and so it does need to make savings and contribute to what we need to do as a country to get our house in order. So we are in discussion with the BBC," he said.
Reports suggested that the BBC would be able to recoup up to £150 million of lost revenue through charging for the use of its iPlayer and other online catch-up services.
He also hinted that the website could be scaled back, saying: "You wouldn't want the BBC to completely crowd out national newspapers. If you look at the BBC website it is a good product but it is becoming a bit more imperial in its ambitions."