In your store XML config you source /appvol/29west/hsbc/config/efx-prd-ln-ume-8cs-twf_tcp-3.cfg in the <daemon> section. It sets "source transport LBT-RM on its first line, making RM the default transport overriding TCP.
You don't specify a different transport option as an <ume-attributes> for any store so the transport remains set to RM.
Since you also don't specify any additional multicast addresses or port ranges the LBM defaults remain in effect.
Precedence ordering is LBM defaults, config file, UME XML.
The transport in question here is only used if Proxy Sources are enabled, which I didn't notice in either file. The proxy source would create a RM transport but never send any messages (since proxys don't send messages, just late join old messages)
The various connections used by UMP is described in the UM Guide for Persistence, it discusses the registration, data transport, acknowledgement, and recovery channels. Only the source data transport is configurable, the rest are TCP.