If you use the Trend jig you'll need either a 16mm guide bush
and a 12mm diameter cutter or a 16.7mm guide bush
and a 12.7mm (1/2in) diameter cutter. Trend sell guide bushings in both these sizes to fit the Porter-Cable (generic American) router - these guide bushes also fit the fixed base directly, or the plunge base by using a guide bush adaptor (made by Makita and others). The big plus of using the 16.7/12.7mm combination is that you can get a hinge recessing bit
in 12.7mm size (they are rarely available in 12mm diameter for some reason). These bits cut faster and clear waste more efficiently than conventional straight 2-flute cutters but aren't designed for plunge cutting, so you need to feed in from the side, not really a problem when hinge recessing.
Above: Hinge recessing cutter
Below: US-style (Porter-Cable) guide bush
Note that the guide bushes above are NOT the traditional Trend pressed steel style, so guide bushes for the Elu MOF96/deWalt DW615/Trend T5-type routers are not
TBH you don't need to use a jig - set-out the hinge positions on a rod from the door casing (with a 3mm packer at the top between the head and the rod), transfer the settings to the door then mark-out conventionally with a combi square and knife. A trim router can then be used to hog-away the majority of the waste freehand using a 2-flute straight cutter (8 to 16mm diameter). The remaining waste is then removed using a sharp chisel and a hammer or mallet. I have the Trend jig, but unless I'm doing half a dozen (or more) identical doors the hog-it and chisel-it solution works just fine. Jigs only save time if you are doing multiples