The following announcement has recently been made by Betfair, but this is not expected to affect Cymatic users because Cymatic already supports TLS1.2.
"Please be aware that from 1st December requests to all Betfair Exchange endpoints will no longer support the TLS 1.0 security protocol.
Following the previous update relating to TLS support for Login we’ve identified a small number of customers still using TLS 1.0 to make API requests and these have been contacted individually.
From 1st December only TLS 1.2 and above will be supported."