Twee: All VAT inclusive - are there any "T & C" that I need to watch out for - such as contract periods ?
So Scottish Power LIED to me - when I asked them to ensure that I was on the cheapest tarriff ?
Why are their tarriffs so god darned complex ?
It is almost as if they are designed to confuse the customers !!!
My comment on your last point - yes - but unfortunately hardly policed by our "big government" appointed quangos.
Regarding your other questions I wonder if you are missing something in your use of the comparison websites. I checked Moneysupermarket and another one and both listed Online Saver 4 ( and the existing tariff rates). Both made it clear that the Online Saver 7 was "locked-in" until December 2010 and that the tariff offers a guranteed 3% discount to standard rates (but currently delivers a much bigger discount to current standard rates).
Actually there is a subtle issue here. It is neither "fixed" nor "capped" except capped to 3% below standard rates. What happens to your rate if the standard rate changes? Probably nothing. In terms of the T&C the only guarantee is 3% below the standard tariff for which benefit you are locked-in until December 2010.
"LIED" is a very strong term to use. Maybe your question was ambiguous? Certainly you had to ask here for answers readily available on comparison websites and your bill. Learn to use the comparison website effectively and you will not be subject to questionable accuracy and comprehension of customer service staff.
FWIW, my experience of Scottish Power is quite good and the tariffs display less "gotchas" than other competitive suppliers.