Agent's requirements before offering

I am a FTB and not having anyone who has bought recently to ask for advice I hope someone can give me some guidance.

My husband and I viewed a property and the agent gave us a "What to do next" sheet in which it states:

"I will need to see proof of how you are funding the purchase. Be this cash or mortgage.

• Proof of Deposit or Cash, which is accessible
• Copy of your Agreement in Principle/Mortgage in Promise - which must have been hard credit checked."

It goes on to say that they 'need' us to come in to speak to their financial advisor for "financial qualification and money laundering checks".

To my mind, I thought an AIP was proof enough that you are financially sound enough to offer. We have one but it has been soft checked (by Halifax) - do all agents play it this tough and require a hard-checked AiP?

I am uncomfortable with the idea of "Proof of Deposit" - does that just mean I can print off my savings account statement and redact sensitive information or will they want more? Why should the agent have any right to see this? Surely that is between me, my lender and my solicitor?

Furthermore, I don't see why I should speak to their financial adviser if I'm using my own broker. I wouldn't want them doing further hard checks and damaging my score if my broker/lender is going to be doing checks too.

Is all of this normal to be asked to do before, or at the point of, putting an offer in? Is it worth steering clear of agents who are asking for this much information?

Or, am I just being a nervous FTB who is a little paranoid?