Bear in mind that the MATZ only exists when the station it surrounds is open for 'operational' flying ie at weekends when there's only gliding or light aircaft flying, the ATZ exists but NOT the MATZ. Having said that, bear in mind that if there's a UAS based there, they might be doing practice 'CDTC' aka QGH letdowns (which are done without radar cover) which often start above the transition altitude, so it's best not to fly directly overhead just above the ATZ.