Countries with high-speed rail networks in operation : France, Germany, Netherlands and Belgium, Italy, Norway, Portugal, Spain, United Kingdom.
Countries planning high-speed rail :Austria, Switzerland, Russia, Sweden, Turkey.
French-Belgian-German-Dutch
Thalys trains
Eurostar and Thalys
Thalys 300 km/h
Eurostar trains connect London with Paris and Brussels through the Channel Tunnel.
300 km/h 
France: 
Top Speed:300-320 km/h
French The Réseau-class
TGV 
TGV Duplex trainset
Avignon TGV station
Paris Gare de Lyon
TGV Sud-Est
TGV Atlantique
Germany: 
ICE network in Germany
Red: 300 km/h
Orange: 250 km/h
Blue: 200-230 km/h
Grey: Conventional lines
3rd Generation
ICE train
ICE-TD 
ICE-T2 
Italy: 
Italian Eurostar ETR500 Top Speed:
250-300km/h 
Norway: Flytoget at Oslo S
speeds of up to
210 km/h 
Portugal: Alfa Pendular Top Speed:220 km/h.
Spain: Alta Velocidad Española (AVE)
Top Speed:
350 km/h
AVE "Alstom" trainsets
AVE "Talgo 350"
United Kingdom 
No current British domestic high-speed trains are able to operate above 200km/h, however several proposals put forward since construction of the CTRL may finally see trains like this GNER Eurostar operate at its full potential
The Advanced Passenger Train was Britain's first attempt at avoiding building a true high-speed line
The Pendolino was Britain's second attempt at avoiding building a true high-speed railway. Its immediate success is encouraging proposals for further domestic routes.
to be continued...