i remember doing the 'tourist' route about 20 years ago, taking a group of young lads up with one of the BMCs top alpine instructors. We were all kitted up to the nines and several of us were well trained and experienced in winter alpine and Scottish climbing.
As we left the carpark, a young group of lads passed us by, dressed in good quality jeans and trainers (bear in mind it was march, although a gorgeously warm, sunny day), plastic carrier bags and wooly hats. various derogatory comments were made toward us.
By the time we were 2/3rs of the way up, it was true white out conditions and at least 2.5' of snow and ice under foot. we soon came across the group of lads, already lost and showing the first signs of exposure.
We canceled the climb in order to help the lads return safely to the car park.
It really was an eye opener as to the true lack of understanding of the dangers of being in the great outdoors.
Razz, i understand it is difficult to not do what you hoped, but, in fairness, well done for asking here and knowing your limitations. The Ben isn't going anywhere, so get some more training and experience in and try it again next year.
Just enjoy those hills.