Deck Access

DDFUNK

Hi,
I was wondering if anyone has ever had a issue with being turned down for a mortgage due to being told you have deck access?
I'm currently remortgage in a flat I've lived in for 10 years. My block of flats contains 8 units. I live on the top two floors (its split a split level flat). 
It's not former local authority or similar, but is a 1960's build.
To access the flats you gain entry through a secure enclosed hallway in the centre of the building. 
On the first floor there is an entrance to two flats on the left and right hand side of the hallway. 
This is repeated on the second floor.
On the top floor there is a door on either side of the hallway that opens up onto a small balcony. Each balcony has access to two flats. This space is generally used for leaving muddy boots, or for my friends to have a quick cigarette without having to walk down two flights of stairs.
A surveyor report has been submitted to the mortgage lender saying my flat has balcony access. It omits the detail that to get to the balcony you need to go through a secure door and past 4 flats that don't have balcony access.
The mortgage company has a term which reads they don't offer mortgage to "former local authority properties which have deck access (ie an accessible balcony that runs the length of the building).
I have gone back to the mortgage company stating that my balcony is not accessible for anyone accept for me and my neighbour and you have to go through a secure internal hallway and staircase to get their. As it is not local authority, not accessible, and doesn't run the length of the building, I'm certain my flat doesn't meet any of the 3 tests laid out by the lender that defined "deck access".
I've been in contact with the lender, they said there was nothing they can do as the surveyor will not change their mind.
I've been in touch with the survey company, they said if my flat is laid out as described then it is not deck access, but the mortgage company need to instruct them to review it.
I should note the survey was carried out in less than 10 minutes on Friday 18th December at 5pm by a guy working overtime to cover sick leave. I think he's rushed through the report before Christmas missing key points which has mislead the mortgage company and underwriter.
Following my digging around I think the bank has lied to me, as there is a objective mistake on the survey which they are not following up.
I'm disappointed to miss out on a mortgage with them and now very concerned that a surveyors report has been produced saying I live in an ex local authority property with deck access which could render my flat unmortagable. 
Does anyone know what I can do to resolve this?

K_S

@DDFUNK If you are wedded to this particular lender, you could try see if a formal complaint gets you anywhere.

If not, then consider a product switch with your current lender or consult a broker to recommend another lender (do mention the background).

There are quite a few lenders who do not lend on "deck access" or "balcony access" flats and loosely speaking it's defined as flats that are accessed using a covered walkway

Good luck!