I wondered the anal prolegs too, but when I checked it seems that sawflies can sometimes have them. Having said that, it doesn't look like it has the extra prolegs that a sawfly larva would have compared to a caterpillar. Plus the seemingly minimal number of prolegs at the back would indicate a Geometrid moth unless there are more prolegs that the angle hides from view. The latter can be variable in colour too, just to make it more difficult. If we could confirm that the number of prolegs is as they appear in the pics then we'd know we were in the right family at least.
