Re: Wonder how this will impact UK banks with no US presence?
Patents are national grants , so a US patent is not valid outside the US. The move is mainly against trolls in the US.
The UK/EU is also not really a place where patent trolls thrive, simply because the payouts on a possible win are much smaller and more based in reality ( starting with the simple issue of requiring someone to actively use the patent for something other than litigation in a lot of cases...) , and the UK/EU patent agencies are ( as yet ) a lot stricter in what they allow as a patent, so there's far less "frivolous"/obvious/insane patents that can be used as ammunition in a case compared to the situation that has evolved in the US.