Linda, The mess that Wonka was referring to is: "RT will orchestrate a wonderful, exciting, sensual visit. That's what I would do if my lover was coming for an extended visit." I would call this mess because it is a tangled web of deception and he will need to experience it and figure it out w/o your help, if and when the time comes. Of course, I know you now are aware that you can't rescue him.
As for letting him know that you have landed in London safely...I would only do it if he asks you to...otherwise, I'd go on my merry way and enjoy myself.
Your h should be nervous about his visa. There is a huge difference between 6 weeks for the flight and 12 weeks for the possible visa. You never know...someone could flag it as being an illegal entry along the way. One just never knows about such activities and if they are real or a "sting operation" set up to catch people who are crazy enough to use this service.
As for you...think about your trip and know that you are going to have a great time.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.