Alina W - thanks for that. Grateful for the advice and will replant at leaf die-back stage.
Yes - I suppose I did go a bit overboard with the drainage effort! Beginners knee-jerk reaction to sometimes tricky clay soil conditions and sometimes misinterpretation of the emphasis on 'drainage' in the ever-increasing second-hand gardening book collection. Being still lacking in natural 'garden sense', I'm sometimes a bit over-cautious and can end up causing as many problems as I attempt to correct in order not to lose precious plants.
Reading gardening literature with a sometimes over-serious or dilligent attitude can have it's hilarious consequences and that's another fun aspect of being new to something. I know this is a completely different subject but it neatly illustrates a beginner's psyche. I put off moving a medium sized shrub for a year thinking I'd kill it if I didn't get it right. I was so concerned about losing it that I read a lot of seemingly complicated and cautious advice.. THEN - when reading an old Geoff Hamilton book purely for pleasure, I came across a couple of inspiring sentences on the subject of moving a shrub. I can't remember which book it was so can't quote the exact wording, but he merely said throw a bucket of water over it before you move it and throw another bucket of water over it when you replant it. Worked perfectly - beginner's angst over in that instance.
It's a great thing for new gardeners to get straightforward advice or hear of other's experiences - and dare I say very calming and confidence-building when little things can get blown out of proportion when we have a less than perfect gardening day.
Sorry for the thinking-aloud digression and drifting off topic. I imagine new gardeners are as annoying to experienced gardeners in the same way that people who have just stopped smoking become an irritant to their continuing smoking friends. 