We've had two assignments here in the UK. Both times the conditions of employment included moving household effects here, up to a weight of 2000 pounds. That will be the first thing for you to work out with what ever mover your husband's company uses unless you are able to judge that yourself, once you know what your weight allowance is.
Bring no electrical items at all. Those you will replace here and sell when you leave since there is only 240 voltage in the UK.
What you do not choose to ship can probably be stored with the same company that moves you. No doubt, you will find you have a storge allowance, in weight, as well.
This process would be easier if you first secured your new residence since you would have a clear idea of what to store and what to ship. If you do not have the option of a discovery trip, consider the following:
UK homes are much smaller: think your student days in small apartments. Closet space is limited in comparison to what you are used to having for clothing. Kitchens too are small and you should choose what to ship accordingly. The exception would be if your husband is a CEO and his company is prepared to spend £3000 to £5000 for a large residence. ($5400-9000) per month. My old darling is fairly senior and his allowance for housing, local council tax and utilites is £2800 per month. Note that the entire amount does no go for rent alone since you will also have utilities and council tax bills. Have a look at some of the London housing sites for rentals and you will begin to get an idea of what you will be able to rent and what size it will be.
For those who choose to leave their home in tact and ship nothing but clothing and personal items, there are serviced apartments. These are favored for shorter assignments and generally found in central Lonondon. They will start around £2000 a month.
As to the hour commute you plan for your husband. Tut Tut.
Spending two hours a day, everyday, on public transport is not all that pleasant. My huband is a 20 minute walk from his Canary Wharf office. He leaves at 7:30 am and never walks through the door of an evening before 7:30 pm. Most American employers still expect, and create a corporate culture of expectation, that people will arrive by 8 and not leave till 6:30 or 7 pm. It will be marvelous for your husband if that is not his situation. But if not, you will see him leaving at 6:30 am and not home till around 8pm. Poor guy. This week we are pushing 90 degrees, never pleasant in a city, even less so on hot, crowded trains. Bear in mind also that often on the hop from London to Kingston, a commuter may have to stand the entrie journey. We had a time near Hampton Court so I speak from experience.
Starting from where your husband's office will be, follow the nearest transportation links outward and explore the areas you see via the net. You will find a copy of the underground map on the London Transport site. Bus lines follow all the major roads. The trains run from the big stations like Waterloo.
Even if you live in London's Yankee Ghetto (St. John's Wood) where you would be bound to meet and make American friends, you are going to start missing your husband when you get only a couple hours a day with him. And remember, with the all American enviornment goes all the politics and back biting of corporate life.
Over the years, we have distilled our selection criteria for home and work down to three criteria: Location, Job Satisfaction and Salary. You need two of these for any life situation to be enjoyable. We have learned that Location has to be one of the two. Long, long works days simply don't go with long, long commutes.
You will have a big housing allowance, but it will be taxed as income. If you also have a tax equalization program (to adjust for the fact you will be paying BOTH UK and US income tax) that will be considered income as well. On paper, it looks to the US government like my husband is earning almost twice what he is really paid due to these two add ons.
We wanted something to show for this money beside rental receipts. We didn't want to take on another mortgage so near retirement and, anyway, a one bedroom flat is central London costs about half a million dollars. Ouch!
We got around this by buying a Dutch barge and putting it on a residential mooring at Canary Wharf. It is the size of a one bedroom flat and affords a marvelous lifestyle. Now, as we prepare to retire to our little beach shack on the Oregon coast, we can sell the barge and have some return on the housing allowance. So there are creative solutions to living on these overseas assignments.
If you were feeling that adventuresome, you could check out the British Waterways Marinas Ltd site and look at the boats for sale in the two London residential Marinas: Poplar Dock Marina and Limehouse Marina. The web site is http://www.bwml.co.uk/