I found some help on the internet at http://www.meades.org/moths/moths.html#Trapping_Moths. See this website for the method - although I did a few things my own way.
Basically you need the following:
· One sheet of 5mm or 6mm plywood cut into:
· One sheet of 2 mm Perspex [I used horticultural glass] cut into:
· 2 cm square baton cut into:
Angle Shades
Perhaps I'll catch one of these. This is an angle shades moth from our garden.
Here's a couple of iphotos of the trap.


After the first night of trapping using the little halogen bulb, I had caught these moths plus some other micro moths that flew off! Many thanks to moremoth and chrisbrooks from ispot for the identifications.
Scalloped oak: crocallis elinguaria
Riband wave - non banded form: idaea aversata ab. remutata
Scalloped oak: crocallis elinguaria
Riband wave - non banded form: idaea aversata ab. remutata
Gothic (Naenia typica)
Gothic: naenia typica
Unknow moth
Species unknowm