https://www.caa.co.uk/air-passengers/assisted-travel/report-a-problem-with-assisted-travel/
Report a problem with assisted travel | UK Civil Aviation Authority
UK Civil Aviation Authority (CAA) guidance about your legal rights to special assistance when travelling by air. Find out who is responsible for support at...
report a problemcivil aviation authorityassisted traveluk
https://www.gov.uk/hmrc-internal-manuals/employment-income-manual/eim10090
EIM10090 - Employment income: travelling and subsistence payments: assisted travel schemes - HMRC...
employment incomeassisted traveltravellingsubsistencepayments