As the name suggests, an Any Belgian Station ticket covers travel all the way from the UK to anywhere in Belgium and back.
 
You’ll travel with Eurostar to Brussels-Midi/Zuid (it’s one station, it just has a French and a Dutch name), then it’s a simple change to an SNCB train to continue your journey through Belgium. High speed ICE trains, as well as the Brussels Metro and trams aren’t covered by your ticket.

If you're travelling on to Brussels Airport (Brussels Airport-Zaventem station), you’ll have to pay a €6.50 Diabolo supplement each way, which you can do at belgianrail.be, in a Belgian station or on board your connecting train. Find out more at belgianrail.be

You won’t have a seat booked on the local train, so just hop on and find a seat – in first class if you have a Eurostar Plus or Eurostar Premier ticket.
 
There’s no need to rush your connection. As long as you carry on within 24 hours, you can spend a little time in Brussels en route. On the way home, you can arrive in Brussels any time within 24 hours of your Eurostar departure.

Your ticket will only show travel times to/from Brussels.
Please ensure that you allow plenty of time to get from your final destination to Brussels for your return trip.

You’ll find timetables and more information about trains in Belgium at belgianrail.be.