Can you elaborate on Eurailpass, Europass and Interrail Pass?
Eurail is valid in Austria, Belgium, Denmark, Finland, France, Germany, Greece, Hungary, Italy, Luxembourg, The Netherlands, Norway, Portugal, The Republic of Ireland, Spain, Sweden and Switzerland. It is not valid in the UK. The UK has the Britrail Pass the cost of which is additional. The UK no longer has a single national rail company, although the various companies are referred under the name British Rail aka BritRail.