If softbank had setup its own R&D and manufacturing plant in the uk then it would be investing in the uk, as it stands its buying an international asset that just happens to have a plaque on a wall in the uk, which can (and probably will) be moved elsewhere.

its quite staggering how naive people are being here about how international companies actually work.

Just take krafts cadbury's takeover as an example, all the promises made before hand, did they stick to them? did they hell! factories closed, quality down, asset stripped and split off.