This brown scale insect can sometimes be detected by the white wax film it produces, usually on the underside of leaves, which protects its eggs. 

Unless identified by a recognised expert, a photo is required. If the photo doesn't show the key ID features then in the comments box describe the size and identifying characters you have observed.

It is a polyphagous insect with more than 80 host plant species belonging to 35 families and is considered a serious pest of fruit trees and ornamentals in many parts of the world, especially in countries with tropical and subtropical climate.

Various life stages may be seen in most months of the year.

True status in Britain is difficult to determine due to lack of records.

Status in Leicestershire and Rutland not known.