Yahooooo - update especially for those who gave me some good tips in replies above
Stage 1 - I got cheeky and asked my Tubs maker BlueWhaleSpas Nottingham for draining down tips. The Tub I have was superb value and their Customer service is great. I really rate the Tub and the service
They rang me up and said they would send instructions via email which arrived as soon as call ended. It told me more or less what The Baron had said on here and a couple of others also pointed out
Stage 2 We had a last go and then added the pipe and pump cleaner £1.50 per half litre and ran for an hour
Stage 3 I bought a Wet / Dry vac from b&q for £40
Stage 4 yesterday I drained all water out of Tub using only the lowest point drain and a garden hose - and that took 3 hours but I was inside keeping warm and dry / easiest bit lol
Stage 5 today I took off all the side panels exposing the Heater and Pumps
Stage 6 I sucked out every jet and waterfall pipes & the low point quite a few times until I was getting nothing at all in Vacuum
Stage 7 Mrs Wherry attacked the Shell with White Vinegar and Water @ 50/50 - then the Lid
Stage 8 I put bubble wrap around the biggest pipes and the motors
Stage 9 I put Panels back on
Stage 10 I bubble wrapped the Tub 4 times round with the Roll I bought last year for £7 (exactly the right height) and put back the lid and then covered the whole lot with a Tarp I bought last year for £30
... and thats it . The proof I did it correctly will come next April but the Electricity has already gone down from 23 units of late to 12, 2 days ago and 9 (NINE) for the 24 hours to 09 00 today. 9 units from 23 ?
So thanks again all - under £80 and everything reusable again next year as against £350 I was going to be charged. I feel confident that I have all water out but time will tell especially if we get another B***t from the east
Now let it get a bit darker and its Nelsons Bitter time - and a Wobblygob Cider for the labourer