According to this web page (https://www.interrail.eu/en/plan-your-trip/tips-and-tricks/before-you-leave/airport-train-station-connections), some connections from airport to city center and vice versa are included in the interrail global pass. Does using these connections count as a travel day? We are flying from our homecountry to our first destination, and staying there for a few days before starting our interrail. Do we have to pay for train from airport to city center, if we don't want to "waste" our travel day in that?
Also, we are flying back home from London, but we are going to stay there for a few days before our flight. Can we use our rail pass there to connect from city center to Heathrow, even tho we have already used our travel days (but we still have time left in our pass)?