By SAM JACKSON

PREVIEW... Saracens v Harlequins Today, Kick-off 3pm, live on BBC iPlayer and BBC Sport website and appCHAMPIONS Harlequins have beefed up their side for the challenge against last season’s beaten finalists.Head coach Gerard Mullen makes six changes to the XV that defeated DMP Sharks 69-7 last time out, with England internationals Vickii Cornborough and Amy Cokayne coming into the front row and Heather Cowell returning to the wing after two weeks away with GB Sevens out in Dubai.Newly-capped England international Lucy Packer starts at scrumhalf while Fi Fletc...