Canal lock and loading key

A day of packing and trying produce order from chaos. H having to do some work so we were packing her flat. Big job.
In the early evening I went for a Parc run while C and H bought food and extra packing bags. The plan was that they would leave the keys to our apartment in the microwave of H’s apartment (to which I had a key). Got back. Searched the microwave. Searched harder. Took the little plate thing out. No key. They had forgotten. So, rather than wait around, sweating, I went back for a second Parc run.