Riverrock83, I am assuming that you are referring to the large international airport on the Ayrshire coast. They have a bit of previous here!
Last summer, shortly after I had passed my PPL I was in a C152 cleared join right base for 31 and to report final. I then heard a PA28 being cleared to join left base for 31, and also to report final. I was lit up like a christmas tree - well landing light on - and assumed ATC was in control - the name kinda gives it away - so I continued, still not visual with the 28, and was about to turn and report final, when the pilot of the PA 28 called final. I was a bit lower than him, in a 152, so I'll let you work out the visibility possibilities! Anyway the training kicked in - it is not exacty the situation described by the OP, but similar - I firewalled the engine, and instinctively made a sharp right hand orbit, getting a very good view of the underside of a PA28 in the process!
I will say with 20 20 hindsight, that we were never in any imminent danger of collision, and ATC were probably technically right to do nothing, but I and the other pilot, who is a member of the same club had a chat later, and with the CFI, felt ATC could have done better- it was a bit tight, and as it turned out, we both nearly s*at ourselves!