FTB - am I doing things right? Estate agents now making me worried

Hi all,

Just wanted your opinion or just for reassurance. I'm an FTB, the lender has completed an in person valuation, and requested from the vendors building reg certificates as they've found significant sections of single/substandard walls which require upgrading. The vendors have said they've not extended the property (they've been living there for 40 years apparently), they only renewed things and sent us the title plan to forward to the lender, so now just waiting on the results for this - the lender told my broker it'll take up to 4 working days to review and then go back to the valuers which could take 7 working days.

I updated the Estate Agents who was not happy with the time frame and was also confused as to why I would also be instructing my own survey after this (that's if the lender approves the mortgage). I thought this is normal for me to do this? She sounded shocked on the phone, I explained to her the valuation that was conducted and went round to the property was the lenders surveyor not my independent one, the lenders don't provide me with a report. Not sure if there's been a misunderstanding - I assumed when the surveyor called the estate agents, they informed them it's from the lender? Anyway she really threw me off and she said she'll have to let the vendors know as they would like the process to move quickly. I feel worried now as I really want the house and things are out of my control.

What's your opinion on this?