Is the produced code open sourced or publicly downloadable? That's possibly what BBC should do, providing £100M actually produced something worth open sourcing.
It's very unlikely to be useful, unless you are running the same platform and have an interest in implementing business rules for the same use cases as the BBC have. Much of the interesting functionality will have been licenced from outside providers, and most of the cost will have been paying Siemens, paying Siemens to cancel the contract, and other staff and consultant fees.