I have received two emails this evening warning me of the above.

One in Spanish saying:-

Se va a realizar un mantenimiento programado de los servidores de Total Connect Comfort & Lyric en la fecha siguiente:

Inicio: 19/10/16 4:00 AM (GMT)
Fin: 19/10/16 5:00 AM (GMT)

& one in English saying:-

The Total Connect Comfort & Lyric servers will undergo planned maintenance at the following point in time:

Start: 19/03/16 4:00 AM (GMT)
End: 19/03/16 5:00 AM (GMT)

I assume the Spanish dates are correct and we are not being retro-informed of an outage in March !