Woah! Where did that come from? After a long period of relatively small donations (£25K or £30K a quarter), Fidelity gave the Tories £125K this September. Search for "FIL" under "donor name" here. Maybe it's a sign that they think the Tories have the election in the bag? Who knows.
According to a Bloomberg report it's because: "We see donations as part of our ongoing business activities... We live in a very highly regulated environment. Government has a big impact."
Fidelity has also been getting a few days out of MP Sir John Stanley recently. According to They Work For You he has spent about 3 full days (25 hours) "attending meetings as necessary and advising on business opportunities and risks" since July. To be fair, this might just reflect improved disclosure (he didn't used to disclose either the fee level or the amount of time spent working for Fidelity).