funding my sharedealing account

ive just opened a halifax sharebuilder account and traded using all of my cash/funds last week

this week ive got no cash but i do want to invest again, without having to sell anything

ive got a bank account with nationwide and so with it taking 3 days to hit my sharebuilder this would not reach it in time for my next dealing date

my partner banks with the halifax and has said i can take some from her account which then only takes one working day. question is, will the payment be rejected as its not my bank account its coming from (we're not married so it would be different names and different accounts) or will they simply process the payment as if it was coming from my own account?