Lots of info here on the stocktwits forum. Looks straight forward if your online broker will list it the day it goes live. https://stocktwits.com/symbol/RBLX
shareDeal active is a trading name of Jarvis Investment Management Ltd. My payment to primary bid for CBX appeared on the bank statement as Jarvis Investment.
Just spoke to HL, they said according to the information they have currently, the CBX shares can be traded this Friday 26th Feb. As for shares coming across from PrimaryBid, that depends on when they are received, which might not be before this Friday 26th Feb.