Just that. I rent and would like to buy. I'm old for a mortgage (45) and don't have enough deposit yet - but have a good job & am almost there w deposit
Just want to move on from looking at an app and speak to a real person about how much I can borrow so I can work out exactly where I can live. Clue: not london 

Do I just book appointment with nationwide or should I see a broker. If the latter then how? Honestly I've tried to google this stuff but none the wiser.
Really want to make 2018 the year. So grateful for any help.