Oh, I forgot to mention that most major UK employees offer interest free loans for staff to purchase season tickets for travel. When I worked in London, I had an annual travelcard, which my employer paid and then I paid back monthly. Whenever I used public transport for work purposes, I could then claim back the cost of that trip from my employer - which represented a big saving.
Anyway, your husband's employer may offer something similar - if you don't ask, you don't get!!
The last poster said that trains here are stuck in the 60s, well, things have improved and while far from perfect, I would say that the trains are better than they have been in the past (but still damn expensive!). You'll find some lines better than others.
By the way, I am now living in Leeds, where we have a great local train network and it's relatively cheap too. Hooray for Leeds! (I don't miss the London commute!!)
Chris