UK Business Visitor - Funds requirement

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Hi,

I want to come to the UK on Business Visitor visa from Pakistan. A company based in the UK will provide me a letter where they will state that they will provide me: accommodation/hotel, travel expenses, food, the address I will be staying etc.
This is first time I am applying to visit UK.

In above scenario, I have 2 questions:
1) Do I still need to have a certain amount of funds in my bank account? If so, how many (in GBP) should I have and for how long?
2) Is there anything further I can do to strengthen my application?

Thanks in advance.