(1) A party who is required to provide and is not able to obtain a witness statement may serve a witness summary instead.
(2) The party who serves a witness summary must certify on the witness summary the reason why a witness statement could not be obtained.
(3) A “witness summary” is a summary of the —
(a) evidence, so far as is known, which would otherwise be included in a witness statement; or
(b) matters about which the party serving the witness summary proposes to question the witness, if the evidence is not known.
(4) Unless the court orders otherwise, a witness summary must include the name and address of the intended witness or other sufficient means of identifying the intended witness.
(5) A witness summary must be served within the period in which a witness statement would have had to be served.
(6) Where a party provides a witness summary, so far as practicable, rules 29.4 (requirement to serve witness statements), 29.7 (procedure where one party does not serve witness statements by date directed), 29.8 (witness to give evidence unless court otherwise orders) and 29.9 (amplifying witness statements at trial) apply to the witness summary.