Hi MM ! Sorry but personally I don't think it is. I have found most of the information I needed on the secondary school websites.
I am not sure what the system is at the school your kids are at but am going through the whole process with my oldest at the moment and have had a meeting with the headmistress and together we discussed what secondary schools I should visit. I then got a detailed e mail with information on the secondary school we discussed. I think most schools in the area probably follow the same process ?
Good luck - like you I am not British and find the system in this country very complicated ! 11+ / Common Entrance / Pre-testing ...vaguely starting to get my head around it all !