How do I confirm if a Business in the UK is real? Is there a website that has a list of established businesses?

Here are the details of the company. Please help me to find out if this is a right or fake company.

Details:

GP ADS LTD
Street Address: 1 Fantastic CUMBERLAND PLACE,
City : MARBLE ARCH,
State: LONDON,
Zipcode/Postal Code: W1H 7LW,
Country: ENGLAND

Phone number: 447045746132