Investing in a solid tiled roof will make your conservatory a more functional environment because it will be much more thermally efficient. The added insulation will ensure there are no extreme seasonal changes in temperature and no glare from the sun. It will also minimise the noise of rain pouring down compared to your old roof.
If you would still like to have a bit of sun shining in through the roof, then we have a solution for you. Skylights are a great option for being installed into a solid tiled roof. This will give you the classic conservatory feel but with the added benefit of not being so in touch with elements outside.