An inexpensive choice by a reputable manufacturer is the AudioTechnica LIB 22HC.

It retails for less than £200.00, has a headworn microphone, and comes complete with a (plastic) carrying case.

It's licence exempt in the UK on the four VHF frequencies 173.8, 174.1, 174.5 and 175.0 MHz (174.8 is a lemon!).

If you wish to pay more, check out the Sennheiser Evolution series.