Hello there, thank you for your input! I thought that I had seen and dealt with all the quick release clips on the market but this one is completely different. There is only around 8mm space between the clip and filter body so access is limited. I can see using a mirror 2 small slots in the lower clip body which must be the release access. In the interim I have found a Ford tool that looks to be the one for the job. OTC 7782 is an aftermarket replacement. We'll see when it arrives from the States. I will attempt to upload a picture of the tool and packaging which shows an exact representation of my clip. Thanks again and I will post the result when the tool arrives. I guess that I could use some bent end circlip pliers but fear damaging the integrity of the existing clip.
