Trapped

Mr and Mrs Swallow came to visit our boiler room via the open window.
After flying round in circles they decided to attack the window, failing miserably to find the small open gap.
Much flapping later (that was just me) they were each gently wrapped up in a towel and taken outside.
Having been set free there followed an angry mid air dispute over who had made the navigation error that had caused them both to end up in our boiler room!