Go through a whole of market fee free mortgage broker and they should be able to help. They have access to plenty of lenders who will go beyond 65.

Abbey dont care as they have first charge so if you stick with them you should have no problems. All it is based on is affordability. If you try and move lenders your second charge lender will probably say no anyway.

My opinion is that the market has not quite bottomed out. Wait around 6-12 months before buying. It is never a good idea to buy in a market that is clearly going down.

No sorry with no means of paying back and no income

What are the size of the defaults. The Abbey will accept up to £3000 so its always worth a try with them first. What lenders have thy recommended.

It will reduce the payments not the term unless you ask them to do that to keep the payments the same.  The 10% overpayment facility is based on the outstanding balance so it does not matter how much you pay per month.

You would be better going for something flexible with no tie ins. However Nationwide dont offer these types of products. If you wanted to stay with Nationwide you could take out another fixed and then port it.  However this is a risk as new underwriting will be done for the porting. If they say no you would have to pay the redemption ...

More than likely you will pay nearly two months worth on the 1st Jan.  Your key facts illustration would have stated the first payment as two months worth.

I assume you dont have a deposit.  You would be able to obtain that mortgage amount based on your income.  You may be also able to consolidate the £4000 on top.  This will all depend on your credit score. There are still quite a few lenders who do 100% mortgages and rates can vary.   If you want some illustrations ...

Dont use a broker with a limited panel although it is better than talking to just one lender.  Make sure the broker is Whole of Market and does not charge you a fee. If they do find someone else.