Thanks all for your replies!

Regarding medication - I am on nothing new since developing all these symptoms over the past five months; apart from Methylcobalamin Vit B12 sublingual, 1,000 to 2,000mcg per day. I thought it was a good idea to start taking B12 as even though my level at 263 pmol/L was 'in range' and therefore acceptable to my GP, I compared it to two levels I had done in the past (2001 & 2004) and it is definitely falling.

I'm certainly very pleased if I do not have PD!

Will just have to keep searching for a diagnosis. Hopefully the new neurologist I am seeing in December will be more helpful than the first neuro I saw in August.