Rule 29 Service of witness summonses
(1)
A witness summons issued under rule 21(2) or rule 25(1) shall be served on a witness—
(a)
by delivering it to him personally;
(b)
by leaving it for him with a person at the witness’s usual place of abode;
(c)
by post in a letter addressed to him at his last known or usual place of abode;
(d)
transmitting it to him by fax or other electronic means, but only if he has agreed to accept service by that method; or
(e)
where the witness is subject to the Act or military or air force law, through his commanding officer.