I feel you need to question much more the conditions under which your company is proposing your short-term transfer.
In principle it doesn't fit existing rules.
The HR folks in the UK branch of your company will be fully updated on requirements and will be able to answer all your questions.
What special skills are you bringing that means the post cannot be filled by a settled worker already here in UK?
How long have you been employed by your employer in your current position?
Are you sure the contract will be for 2 years? I'm not aware of a working permit such as that.
From the limited information you have given GBP2700 per month will not be anywhere near enough.