New Non-o Visa

I am 38, British, not working, no Thai wife and have been in Thailand since January last year. I currently have a one year Non-O issued in Brisbane which expires (ie last entry) in September this year. I will be visiting the UK next month and I am trying to decide whether I should get a new Non-O in the UK. Can anyone help my with the following:

1) Can I apply for a new one year visa when i still have 3 months left on my current one.

2) Are Hull and/or Birmingham still issuing one year non-O visas.

3) When my current visa expires would I be able to get a double entry Non-O in asia (eg Penang). I have 2 million Baht in a Thai bank and I am cuurently buy a Condo - the final payment for which will bring the bank balance to about 1 million.

4) Would the fact that I currently have a Non-O cause any problems if I applied for a tourist visit when it expires