To be fair, via TSB, the UK is investing in new technology companies... not sure how that compares to their investment in car manufacturing, though. However, afaik the main "investment" in banking was to save the banks that were going bust.
Disclaimer: I might be completely wrong about the above!
"If a British company imports components, it has to pay tax on those (and most components are not made in the UK). If, however, a completed device is made abroad and imported into the UK β with all of those components soldered onto it β it does not attract any import duty at all. This means that itβs really, really tax inefficient for an electronics company to do its manufacturing in Britain"
Disclaimer: I might be completely wrong about the above!