Whatever type of time trial you are entering, club or open, you must be a member of a club that is affiliated to Cycling Time Trials (which the Crawley Wheelers are). Being a BCF or CTC member does not generally qualify you to ride time trials unless your BCF Division or CTC District Association is affiliated to CTT.
Entry to Club events is usually just “entry on the line” on the day of the event. You will be required to sign a Club Entry Form, and if you’re under 18, you must show the organiser a Parental Consent Form.
Entry to an open event, on the other hand, must be by an official CTT Entry Form, with a closing date that is usually just under two weeks before the event. If the event is over-subscribed, the fastest entrants (assessed on their qualifying times for the relevant distance over the last three seasons) will be accepted, unless otherwise specified. If you are under 18, your parents must sign the Parental Consent Form.
Once your entry has been accepted, you will receive a start sheet a few days before the event giving details of the course, prizes and your starting time. After the race you will receive a result sheet showing where you finished and confirming your official time.