Be aware that if the roof is thatched, this needs replacing periodically and is extremely expensive, this is certainly not a DIY job. In some cases thatched roofs can be changed to tiled/slate roofs but certainly not if the property is listed. Below are some videos of problems you may encounter and how to deal with them, also pay attention to any flat roods you may encounter, these can last for years but in most cases will need attention after 20 years plus...
