Britain has a pretty entrenched attitude to drinking, which doesn't seem to have been tempered much by the change to 24hr drinking.
In a lot of ways it's worse, pubs closing down, black market booze runs to France and supermarkets selling rediculously cheap alcohol now means people can drink more at home now than they ever could before, making the longer term effects of alcohol even more insidious than they are already.
The fact that more people are waking up to, talking about and actually giving up drink, for any length of time, is highly commendable and a sign that habitual drinking eventually costs you in time, money and health.
And for reference, yes, alcohol withdrawl for a regular drinker can cause insomnia along with many other symptoms you might not expect.
(Just Google alcohol withdrawal and insomnia, it's an eye opener.)
I only gave up the sauce for good, aged 30, when I realised I had been a regular drinker for seventeen years and I would need to return to drink in order to get my old social life back but frankly I found my self control and piece of mind was worth more to me than any fine ale or single malt.