I do understand what you are saying - and this experience would look fantastic on my CV. However its one bitten twice shy with this company. In 2014 we lost one of our most senior members of staff whos salary was 2.5x my own. I took on about 50% of his workload with the other 50% being split amongst other members of the team. I did not receive any extra money for that, and when this years pay review came around I was only given 3%. I also didn't receive the annual bonus that I had come to expect, despite a glowing review from both my line manager and the finance director. The company also had a very strong year.
The project I am being asked to take on was originally meant to be going to my line manager, paid twice what I am. He has decided to leave the company for opportunity's elsewhere and the only person with the skill set and the relationships with the teams to take this on is me. I'm quite literally the only choice, if I do not do this they will have the split the work amongst at least two other people.
I am not asking for a huge rise to do this - £3k would have done it, £5k I would have been delighted with. Considering the work was supposed to be going to somebody paid £80k+ I don't think I'm asking for too much.
There is also a lot of uncertainty here at the moment - if I was sure of a future at the company then I'd probably not be as focused on the short term. We currently have two offices, our head office in Manchester is where 90% of the back-office tasks take place. We then have our London sales office which has the Financial Reporting function attached to it. The lease on our London office is up in 2 years time, and all vital management functions are slowly being transferred to Manchester. I fear that no matter how well I perform in the role I'll be out the door in 2 years so will never reap the financial rewards.