Working from home is a fabulous option if the nature of your work allows for it. Not everyone is afforded the luxury of working from home, but there are some real advantages to this way of doing things. For a start, you can organise each working day around your lifestyle and around the particular needs of your family and household at large.
Working from home also gives you the opportunity to save time and money by avoiding the daily commute. There are plenty of other reasons why working from home is such a good idea. The only issue is whether your home in London is capable of accommodating your working space as well as your living space.
A good way of making sure that this is the case is if you actually address the matter practically. If you decide you want to work from home then you could back up the decision by renovating your home accordingly. Extending will give you extra space, but you could also revamp your interiors to allow you a bit of space that you can dedicate to your work rather than your day to day life.