The law on giving alcohol to children under 5 years of age clearly reflects first aid practices at the time it was introduced (1933). It's legal to give alcohol to such a young child as long as it's under medical supervision in an emergency! (Can anyone imagine a doctor today saying "Quick, fetch the brandy bottle for your toddler"?).
I think, JB12, that you'll be in a minority here if you've found that the 'novelty has worn off'. I'm 58 and there's still renewed novelty whenever I can afford it ;-)
My parents might have let me try an occasional sip of beer before secondary school age but I think that I was probably around 12 or 13 when the old man would bring a bottle of 'Pony', 'Cherry B' or 'Babycham' home for my mum, and a bottle of Barley Wine or 'Cobnut' (a sweet brown ale) for me every night.
I remember that the first party I attended with booze (and with parental approval) was my friend's 14th birthday party.
Chris