FWIW I often have to go the next frequency if the last one is too busy to get the call in. Also Shoreham is occassionally so busy on the radio that one cannot make the call for anything up to 10 mins. And Solent often don't like providing a service to GA; I usually find them pleasant enough and they give an FIS but they get rid of you as quickly as they can; they have a lot of traffic with Southampton.