Well, here's the promised update on Greg's day out for anyone who's interested. I've been reluctant to post given the terrible event in London on the evening of our visit. I did promise an update though.
Mawbroon - as you said, thank goodness we didn't have to pay for excess baggage. His 'luggage' did turn out to be quite heavy.
trisher - he did have a lovely day and he was as good as gold. You were absolutely right too about this bringing back memories for him. He was so well behaved in a way I've never seen in him before.
NannaandGrampy - thanks for Addison Lee recommendation. We used them twice on the day and they treated him really well. I see what you mean about their cars being bigger than black cabs. They were really quite luxurious - Greg says thanks... he liked travelling in style!
rubylady - fortunately, as it turns out our DIL took Greg for a walk along the Thames while we were at the appointment (my son came to the appointment too).
Iam64 - I'd be delighted to lead the country if I get TM's shoe allowance! Actually, strike that... I couldn't really care less about fancy shoes and bags. The trend whooshes right over my old head ha ha.
Luckygirl - I'm pleased to say that he didn't 'crap' anywhere inappropriate- a good walk before hand took care of that. He has more 'staying power' than me in that department.
He was great on the train. We managed to find a space between the first class carriage and the next one with only two seats and lots of legroom. We had the same seats on the way there and on the way back. As soon as we sat down, Greg lay down. He definitely went back into 'working' mode and it was fascinating to watch.
When we left the train, he took up his position on my left, walked slightly in front of me, turned his head around to check if I was ready and the second I started to walk - he did too! I got a wee bit teary as I'd never seen this side of him before. He continued like that all day... always walking slowly, always checking.
We did go for lunch - nothing fancy, just fish and chips and a round of drinks for all four of us. Greg lay on his blanket under the table after a feed and a good drink of water. Lunch was my treat as my son had taken a half day off work for this. I somehow managed to retain my composure when I got the bill - £72! I knew London was expensive - but! I wished I'd taken NanaandGrampy's advice and had packed a lunch.
All-in-all, the day went really well. We were all exhausted by the end of it and Greg flopped into bed at home but I was really glad that I'd taken him.
Greg's harness is now put away and it's back to collar, lead and playtime for him. Having seen first hand how hard he works, it's back to retirement for this elderly gentleman.
Thanks again everyone for coming on our day out with us.