When Frasier enters the apartment after Simon has moved in, Daphne sweeps Simon's things off the coffee table onto his duffel bag on the floor. In subsequent cuts showing the table, the pile is back, and eventually Daphne kneels down to start taking them from the table and putting them in the duffel bag as she talks with Frasier.
When Holly tells Frasier she's planning a Reggae festival on Mercer
Island, Frasier jokes that he'll remind himself "to take the Rasta-ferry
over and catch it." Mercer Island is accessed via the I-90 floating bridge, not a ferry.
It's never explained why Daphne's brother has a Cockney accent from London even though he is from Manchester just like Daphne is. Thus, he should have the same Manc accent as Daphne has.