Is Wembley stadium near by? We want to see Coldplay
The Beaver is a 5 minute walk from Earl's Court tube station. You would need to catch the District Line eastbound to Westminster and change to the Jubilee Line northbound to Wembley Park. Allow about 1 hour. However, concerts tend to finish after 11.00 p.m. and it takes time to leave the stadium. A problem could arise in getting back to Earl's Court before the tube shuts. However, you would get back to Westminster and could use night buses to do the last three miles back to Earl's Court. You may prefer to find an hotel a little nearer to Wembley.
It's on the other side of London to Wembley.
The Earls Court tube is a 15 minute walk away so you could take the tube to the concert but check for the times of the last one. If you're going to be in London for more than a day then it's probably better to stay at the Beaver because it's more central and there's more to do.
Get an answer from Beaver Hotel staff and past guests.