Absolute shambles of a service. Does DX stand for 'don't expect?'
4 Passports in 3 deliveries, all failed in one way or another - attempted deliveries that never happened, redelivery that came up as attempted, failed and arrived an hour later...
Text to say arrange redelivery online. Web page that then tells you to call them. Recorded message to say we are busy, email us and cuts you off.
DX are playing the game and so are their staff. The only explanation for HMPO using them is public money seeming to grow on trees!