Just got back from Conrad London St. James, where I was able to obtain a Monty dog after many many requests. As mentioned in my review on the hotel thread, I asked multiple times each day during my stay for a dog, and was told they had run out, but would be getting more soon. Finally on my last night I talked with someone who was able to produce a Monty for me to take to my kids. I was expecting that they'd try to charge me 12 gbp per other comments in this thread, but I wasn't asked to pay. As such, I'll update the wiki on the assumption that this is a general change rather than just my good luck (and persistence).