The best time to do a full house refurbishment is when you are moving into a freshly bought house. You can than decide whether you want to do also a house extension or perhaps a loft conversion without having to live on a building site.
After deciding what to change in the structure of your new home it is time to consider general property refurbishment. You can start with doing a bathroom refurbishment or even add a new bathroom. After the bathroom you can refurbish the kitchen.
If you did not do a loft conversion you should consider doing a roof refurbishment as it might not be in the best condition after many years. As we all know the weather in London can get really bad. There can be a lot of rain and wind that generally can be quite waaring on your roof.