Also its the Government that procures them for you and you get whats allocated to the franchise and you just pay the leasing company for there use.
When the franchise period runs out the trains just move onto the next winning bidder of the franchise, they don,t get new trains for the franchise.
Er, not quite!
The only recent trains for which the Government undertook the procurement are the IEP via Agility Trains for the GW and ECML (the Class 80X) and the Class 700 trains via Cross-London Trains for Thameslink. Note that in neither case is the Government
paying for the trains - they are being funded by the two organisations using borrowed money. However the franchisees of the three routes are compelled to take the trains by the terms of the franchise agreements - the
Train Service Provision payments for the operated diagrams are made by the TOCs in question but these payments are guaranteed by the Government.
In all other cases the franchise contract will specify some or all of the trains to be used and the TOC then makes an agreement with one or more ROSCOs for the supply of the stock. If new trains are to be built the TOC and ROSCO will specify them and the ROSCO will raise the capital to pay for them. The TOC pays the ROSCO for their hire.
At the end of the franchise the trains may or may not be passed on the the successor. In many/most cases the trains are passed on for reasons of depot equipment, staff training, route clearance and so on. But there are some exceptions, DMUs being transferred from their original operator to, for example, Chiltern and Southern.
To my knowledge, since 1994 no Government has purchased any trains directly.