Best way to break up and remove 7ft by 7ft, about 3-4 inch thick concrete shed base. bought a 10lb sledge hammer and gave it 20 or so whacks yesterdy and nothing seemed to happen - I have a long standing shoulder injury so it may not be a solution anyway
Best way to break this up is either get someone else to do it lol or if you want to do it yourself go to
screwfix they do a Titan breaker for £149.99 this will do the job but it is still hard work.
Hope this helps.