Of course the vast majority of this total are micros, which account for 80% thus far. The latest species to push the figure on to 50 are: Elachista apicipunctella, Argyresthia brockeella and Epinotia immundana the only recent-ish macro addition being a single March Moth.
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Elachista apicipunctella
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Argyresthia brockeella
The key to this success is simple - early stage daytime searches (including the rearing through of some of these to confirm ID's). Many of my trials and tribulations in this area are covered in more detail on my blog dedicated to micros: http://kentmicromoths.blogspot.co.uk/
Dave