Services have been suspended between Milton Keynes and Shepherd's Bush due to emergency engineering works at Watford Junction.
Disruption is expected to continue until approximately 07:00 hours.
Over ten million pounds will be spent on a new programme to improve services on Abellio Greater Anglia trains.
The money will be used to provide a range of measures including additional refurbished carriages, new ticket gates and extra seating availability.
"We are totally committed to delivering a better service for our customers, focusing on those areas they prioritise as important. This extensive package of service improvements represents a major investment in key areas of service delivery including the on-train travelling environment, cleaning, seating capacity and performance."
The upgrades will take two years to complete.
Train services between London Liverpool Street and Norwich may be cancelled, delayed or suspended between Diss and #Norwich.GK
#Norwich Please note that the disruption is affecting London - Norwich services (both directions) Other routes from Norwich are running. GK
As part of ITV News Anglia's series looking at the state of sport in the region two years on from the London Olympics, Donovan Blake recently paid a visit to meet the City of Cambridge Swimming Club's Disability Swimming Squad.
Watch his report here:
Increasing numbers of commuters are driving Eastwards to escape London prices, but in the process are they driving up property prices?Read the full story ›
It's not long until the third stage of the Tour de France in Cambridge but already preparations are in full swing for the finish at The Mall in London.
The peleton is expected to arrive in the heart of the capital around four o'clock this afternoon.
An estimated 2.5 million people watched the opening two stages in Yorkshire following the Grand Depart in Leeds on Saturday.
Italian National Champion Vincenzo Nibali wears the yellow jersey when stage three gets underway in Cambridge and passes through Essex and Epping Forest.
More trains, more seats and millions of pounds of station refurbishments are promised as new firm takes on region's busiest rail networkRead the full story ›
Transport Secretary Patrick McLoughlin will officially open Southend Airport's new terminal extension today.
A commemorate plaque will be unveiled to mark the finale of the £120 million revamp which has taken six years to complete.
During his visit, he will tour the airport and have a chance to meet and talk to representatives from all the major airlines operating from London Southend Airport, local MPs', members and officers of Southend and Rochford Councils'.
A Colchester woman has been warned to expect a jail sentence after being found guilty of slashing the neck of Ground Force star Tommy Walsh's daughter in a London nightclub.
Leanne Bloomfield, 28, had denied using a shard of glass to cut Natalie Walsh, 22, upwards from her neck to her chin.
But a jury found her guilty of wounding with intent following a four-day trial and seven and a half hours of deliberations at Southwark Crown Court.
Following the verdict, Mr Walsh, who was in court with his wife and son, condemned the defendant's "laddish" behaviour during the assault on February 3.
After being found guilty, Bloomfield, of Highwoods, in Colchester, turned to the jury and said "I didn't do it", before breaking down in tears.
Judge Peter Susman QC adjourned sentencing to February 7 and warned he had "no choice but to impose a prison sentence".
Art experts think they have uncovered one of the first ever portraits of a pet guinea pig.
A 16th century oil painting showing the animal being cradled between three children will go on show at a new exhibition later this year.
The portrait, believed to have been painted around 1580 by an unknown artist, shows three young children holding the animal which had recently been introduced into Europe from South America by Spanish merchants.
It will form part of an exhibition, called Elizabeth I And Her People, which opens at the National Portrait Gallery in central London in October.
A gallery spokesman said: "We know that guinea pigs were introduced into Europe by traders and were kept as exotic pets.
"While archaeological finds for domestic guinea pigs in Europe are rare, a partial skeleton of one that dates from around 1575 was discovered at Hill Hall in Essex, an Elizabethan manor house."
The youngest child in the painting is also holding a small bird, possibly a goldfinch, which was often used to symbolise Christianity in works of the period.
The exhibition includes jewellery, costumes and coins from the period as well as paintings.