The reliable way to hire a tradesperson

Hi, I’m in Thatcham Berkshire and have put out a job to replace a conservatory glass roof with solid on my builder. unfortunately though my builder says the companies that responded are within 3 miles ,after I reached out to them I found out they were miles away from Worcester or up north. My dilemma is the distance to return if any problems occur afterwards,. Am I being too cautious???

Hi I have a crack in ceiling about 10 inches long I’ve filled with filler but it looks a mess also think the plaster board underneath as dropped by 1/2” any ideas

I have an about 12 Sandtoft Britlock tiles that I need to replace but I am finding them difficult to get hold of at a sensible price. Some sellers want £8 per tile plus £150 delivery charge. Would welcome suggestions on where to source these.