The Queen commemorates Maundy by offering "alms" to senior citizens recommended by clergy and ministers of all denominations, in recognition of their service to the Church and to the local community.
During the service the Queen gives out the Maundy money to 88 men and 88 women - one for each of her 88 years.
Each recipient receives two purses, one red and one white.
This year the red purse contains a £5 coin, commemorating the 300th anniversary of Queen Anne's reign and a 50p coin commemorating the 20th Commonwealth Games in Glasgow this summer.
The white purse contains specially minted Maundy money.
This takes the form of one, two, three and four silver penny pieces, the sum of which equals the number of years of the monarch's age.
The Queen arrives at Blackburn Cathedral for the Maundy Thursday service.
People of Blackburn are lining the streets to see the Queen as she visits the town for the Maundy Thursday service at Blackburn Cathedral.
Royalist author Colin Edwards will be among the thousands of people welcoming the Queen to Lancashire at today's Maundy service.
The 73-year-old has met and photographed the monarch hundreds of times before, and today Colin will personally present her with his book, 'A Personal Portrait of the Royal Family.'
The book features many of the Queen's visits to the North West in a series of photos.
Every year at Easter Her Majesty presents special 'Maundy money' to local pensioners in a UK cathedral or abbey. Today crowds are expected to gather in Blackburn for the Queen's visit to the town's cathedral to continue an ages old tradition.
If you're having a day out to see the Queen and you're planning on taking some pictures we'd love to see them. You can E mail them to email@example.com or tweet them to @granadareports.
Preparations are underway in Blackburn for a very special Royal visit.
The town will welcome the Queen and the Duke of Edinburgh tomorrow, Maundy Thursday.
It will see more than 150 pensioners from across Lancashire honoured with Maundy Money, in a ceremony that can be traced back to the fourth century.
Amy Welch reports.
Details on the Queen's visit to Blackburn Cathedral for the Maundy service.Read the full story ›
The Prince of Wales declined to reveal his own footballing colours today, but did comment on the current plight of Manchester United with a young fan.
During a visit to Chelsea Children's Hospital, Charles was asked which team he supported by five-year-old James Middlehurst, who was in hospital for an operation on his prosthetic leg.
The youngster's mother said: "James asked him which football team he supported and he said 'I don't like answering that'."
When James told the Prince he was a Manchester United fan, Charles joked: "Best not to mention that."