Just purchased a Uni-T UT71C from a supplier in Germany. The internal construction is pretty much the same as every other Uni-T meter with the exception that two correctly rated ceramic HRC fuses are fitted and the board is screen printed with '1000v fuse' on the side. The Cat ratings on the front have been downgraded to Cat 3 600v and Cat 2 1000v, which looks about right, given the circuit layout. The leads supplied have a 2000v Cat 3 rating printed along their length and shrouded probes. As a professional electrician, I wouldn't have any issues using this meter on UK 240 volt domestic mains so long as it is firmly restricted to protected circuits on the output side of the fuse/circuit breaker box. Overall the construction seems adequate to contain any problems inside the meter casing so long as it is used within its design limits. Overall a decent 5 digit 40,000 count meter for not a lot of money and obviously built to a better standard for the German market.
I bought this meter primarily for low voltage hobby purposes and the USB data logging ability. I have a proper calibrated Cat 4 meter for professional use.