My husband and I have Return ticket HND-CDG over the golden week. Assuming current situation of all europe routes being rebooked to LHR continues, i’ll have to purchase a separate ticket LHR-CDG to connect. Of course, eurostar option is also available but going through immigration means my husband will have to apply for a UK visa which complicates things. Does anyone have experience connecting intl-intl airside on separate tickets in LHR? Assuming no luggage, can we go through without having to go landside?