Andreas If you are looking for a holiday in the sun where you can relax on a beach or laze by the pool then you are most likely to be successful if you book to go on holiday out of the UK. Although the UK has some beautiful holiday locations, the weather can never been relied upon and even in the main summer months, we can experience a lot of rain and even lower temperatures.
You may be lucky and pick a week or a few days in the UK when the weather i.e. nice, but this seems to be getting harder and harder to predict. If you really want to ensure that you get the sun and heat then you will probably need to book to go abroad. Some people have actually said that they would rather have less holidays to allow them to afford to go away abroad where the weather is better than holiday in the UK with a high chance of rain.