If you're looking to promote your book in the UK, there are several techniques you can use to get the word out.
First, it's important to maximize your online presence. Get involved in book bloggers, book websites, and discussion forums, as these are great ways to gain exposure. Reach out and introduce yourself - these communities can be a great way to connect with potential readers. Additionally, you might consider having your own website, social media presence and YouTube channel where you can promote your work.
You may also want to consider traditional marketing. For example, you could look into advertising in print publications, having your book reviewed by newspapers and magazines, and attending book fairs and events. To reach those participating in such events, be sure to look into having printed materials such as fliers, bookmarks, promotional items, and book jackets.
You may also want to consider offering incentives to encourage people to read and review your book. Look into having promotional giveaways or discounted prices. Online book retailers such as Kindle, Kobo and AppleBooks often have promotional options which can be great for increasing exposure.
Finally, networking with other authors can be an effective way to promote your book. If you’re able to collaborate with an author in the same genre, you may be able to get your book more exposure.
Good luck!