The £1.5 billion deal will also see new fleet rolled out across the network.
Head Teacher Bans Skirts
Northgate High School in Ipswich has removed skirts from its approved uniform list to stop students coming to lessons in inappropriate attire".
It is the third school in the town to introduce such a ban.
When nearby Kesgrave High School introduced a similar ban it provoked a mixed reaction. Some parents complained it restricted freedom of choice while others welcomed it as a way of maintaining standards.
It comes after Tewkesbury School in Gloucestershire put forward a similar proposal in April after its headteacher said some wore skirts which were "almost like belts".
Northgate headteacher David Hutton said that in recent years the ever-rising hemlines of some girls had led to staff sending students home to change.
Headteacher David Hutton said: "At Northgate we expect pupils to be well behaved, to work hard and comply with our rules and expectations.
"In return they receive a good education in a positive learning environment, which results in the vast majority achieving qualifications and acquiring skills and attributes that enhance their future opportunities.
"With regard to uniform, unfortunately despite contacting specific parents, sending some girls home to change, requiring others to wear a school-owned skirt for the day and repeatedly asking others to 'unroll' their skirts at the waist we still had some girls coming to school in inappropriate skirts.
"I have therefore introduced a trousers-only policy, which will enable my staff to focus their time and effort on providing pupils with the best education possible."
Could Addenbrookes Paedophile Doctor And Essex Teacher Been Stopped Earlier?
The world's first out of hours service supporting veterans across Norfolk and Waveney has launched.
It's Thought Missing Mobile May Be In Bin Lorry - Not Found By Police Yet
Recently Played Tracks
Deposit £10 to get a £40 Welcome Bonus - That's £50 to play bingo, slots and more!*
Over 50 tracks to make you feel-good. New album out now...
Find your local four day weather report here.
What's happening on the roads where you are?
Make Heart the soundtrack to your day and you could be a winner with great prizes up for grabs throughout the day.
Find out more about some of the companies advertising on Heart.
Get some great ideas on how to advertise your business on radio, online and on mobile.