nationwide FTB application and overdraft advice

Hi, just wanted to know if anyone has been successful getting a mortgage with Nationwide on the FTB scheme whilst
in there overdraft?
Im in my interest free graduate overdraft of £1000 and has a limit of
£1500, i dont go over my £1000 as thats when charges occur/interest occur. I plan on paying this on payday if it will help
thinks but dont know if it'll be too late?

I have a car on finance that is £195pm and due to finish feb 15, and a contract phone all which i have always paid on time.

My other half is great with money and has a fair bit saved in his account.

We have £8000 in our save to buy account
and wanted possible to buy a house we have seen that is on the
market £100k.

We went in to nationwide and they've said they could offer us £127,500 way over what we want.

Ive been on supply in same school since sept 2011
being paid through local authority and since June
2012 been on 2 contracts with another starting next week till
end of August 2013, Nationwide say i meet criteria of
12 months employment via fixed term contracts
and that by sept 2013 ill have 2 years worth of payslips from the same local authority.

My other half has been in full time permanent work since 2005 and is on £12.5k a year

Any advice? Im so worried about me being in my overdraft even though ive stayed in my agreed limit, and paid all my
finances on time.

Thanks! A worried
FTB