Most of my brain has caught up

So, to Thursday, my day in London. Amazingly, in spite of forecasts of heavy showers, none of them fell on me, although there was significant rumbling and dark black clouds roiled around the heavens as I walked back across Hyde Park early this afternoon. It appeared as if I was the only person aware that it might rain soon - really, everyone else in the park, some out walking the dog with no apparent rain gear available were quite oblivious.
When I was last in London the National Gallery was closed for refurbishment, so this time... my tube travel was spot on today, right down to buying an Oyster Card from the machine, first use of my Loaded for Travel card was painless. 3 hours in the galleries was all my legs and back could stand so i wandered out back into Trafalgar square, took a snap of jolly old Nelson's Column - you can see Big Ben in the background - and header for Regent Street - detoured a bit to take a pic of the blossom in St James Square and finally headed west along Picadilly, all the way to Hyde Park Corner. I must say the iphone mapping device is very clever, no excuse for getting lost these days, and no need to be such an obvious visitor with one's map in hand. I took the diagonal across Hyde park back to my hotel and am now resisting the urge to have a nap. I finally went to bed last night at about 2am local time which isn't helpful, when you are trying to reset the biological clock.