Yes, and no and urm, yes. As a professional Photographer, I reserve the right to present my clients with only the photos I deem of an acceptably high standard. I may take 1000 shots but some I might delete from the camera almost immediately and some I will choose not to use once I examine them at the post-processing stage. Even professional photographers take bad shots which we don’t want in the public domain! So yes, you will receive every single photo taken on the day, once it has passed the the editing stage.
For £100 you can buy the ‘rejected’ shots as long as you are sparing of their use in social media. Obviously I do not want what I deem to be below standard quality images floating around the internet! Many of the shots will be over or under-exposed. Some might be blurred and many will be almost identical duplicates of shots you will already have received.