There are several cryptocurrency trading platforms in Leeds, UK that cater to both beginner and experienced traders. Some of the popular platforms include:

1. Coinfloor: Coinfloor is a UK-based cryptocurrency exchange that offers trading in Bitcoin, Bitcoin Cash, Ethereum, and Litecoin. It is known for its security features and user-friendly interface.

2. eToro: eToro is a social trading platform that allows users to trade a wide range of cryptocurrencies, as well as stocks, forex, and commodities. It is popular among beginner traders due to its simple and intuitive platform.

3. Binance: Binance is one of the largest cryptocurrency exchanges in the world, offering a wide range of trading pairs and advanced trading features. It is popular among experienced traders for its low fees and high liquidity.

4. Kraken: Kraken is a US-based cryptocurrency exchange that is popular among European traders for its wide range of trading pairs and advanced security features. It offers trading in Bitcoin, Ethereum, Ripple, and many other cryptocurrencies.

5. Coinbase: Coinbase is a beginner-friendly cryptocurrency exchange that is popular among UK traders for its ease of use and wide range of supported cryptocurrencies. It is a regulated exchange that is trusted by millions of users worldwide.

These are just a few of the cryptocurrency trading platforms available in Leeds, UK. It is important to do thorough research and choose a platform that meets your trading needs and preferences. Remember to always practice good security measures, such as using two-factor authentication and keeping your funds in a secure wallet.