VPN IP SEC FAIL OVER

Hello

I would like to know if it is possible to create in Sophos UTM 9 2 VPN IP Sec that work like Fail Over, for example:

Site A ------ IP SEC 1 .------- Site B
Site A ------ IP SEC 2 ------- Site C

Case 1: If IP SEC 1 falls, IP SEC 2 rises.
Case 2: If IP SEC 2 falls, IP SEC 1 rises

Site A:
It only has 1 WAN

 

Thanks