Re: 100m
Around £8696 - there are 11500 branches according to Wikipedia and the article.
That's £2174 per year per branch on average.
Looking from a per machine perspective it's £3333 or £833 per year per machine.
Lucky for Computacenter they will have written the contract in such a specific way they will be able to charge massively for anything not explicitly included, and it'll be the fault of the post office when they didn't ask for keyboards which turn out to be £200 a pop from their exclusive supplier. This is how all public outsourcing and purchasing works unfortunately, but Computacenter have 2 years of sales process to pay for and the value of the contract won't cover that or the realistic supply of all that kit and services for 4 years, not to mention payback for having jumped through spending framework hoops and created various proposals. Of course, in three years the Post Office will claim that the contract has cost way more than expected and demand change at which point the tender will start and someone else will get to play the game for a while.
Cynical? me?