I have a couple of appointments this morning, but we're come 'round after those. [He really hates doing this to Lestrade. He knows it's making the man's life harder. It's for the greater good, though.] They won't see us.

Need to call Sarah, but I wanted to let you know what was happening. Talk to you soon, mate. [He hangs up before Lestrade can get a word in edgewise and offers Sherlock his phone back.]

Don't want to call Sarah on your phone. She might call back. [And god knows she doesn't need to speak to Sherlock.]