The OP wants 6 times salary and can only manage to save 200 a month while having an overdraft in a well paying job?
A strong position would be to have at least 10% of the purchase price saved, plus legal and tax costs. Borrow 3 to 4 times salary, borrow over not more than 20 years and be able to afford interest rates rising by say 2 -3%. Ideally he should have no other borrowings, this means no car loans, credit card debt, overdrafts etc. He should also be able to demonstrate that he can save the same amount as the mortgage amount will be for about 6 months.
A strong position would be to have at least 10% of the purchase price saved, plus legal and tax costs. Borrow 3 to 4 times salary, borrow over not more than 20 years and be able to afford interest rates rising by say 2 -3%. Ideally he should have no other borrowings, this means no car loans, credit card debt, overdrafts etc. He should also be able to demonstrate that he can save the same amount as the mortgage amount will be for about 6 months.