Toulouse, as a tier 1 side, were the first side drawn in pool 6. Once Saracens were drawn in pool 5, Gloucester were destined to face an English side in the pool stages and it turned out to be Harlequins.
The final team drawn in pool 6 are Heineken Cup newcomers Connacht.
The pools in full:
Pool 1 - Munster, Northampton Saints, Scarlets, Castres Olympique
Pool 2- Cardiff Blues, London Irish, Edinburgh, Racing Metro 92
Pool 3 - Leinster, Bath Rugby, Glasgow Warriors, Montpellier
Pool 4 - Leicester Tigers, ASM Clermont Auvergne, Ulster Rugby, Aironi Rugby
Pool 5 - Biarritz Olympique, Ospreys, Saracens, Benetton Treviso
Pool 6 - Toulouse, Harlequins, Gloucester Rugby, Connacht Rugby
Fixture details will be finalised at a date to be confirmed.
Heineken Cup 2011/12 Dates
ROUND 1 11th/12th/13th November 2011
ROUND 2 18th/19th/20th November 2011
ROUND 3 9th/10th/11th December 2011
ROUND 4 16th/17th/18th December 2011
ROUND 5 13th/14th/15th January 2012
ROUND 6 20th/21st/22nd January 2012
QUARTER-FINAL 6th/7th/8th April 2012
SEMI-FINALS 27th/28th/29th April 2012
The 17th Heineken Cup Final, Twickenham Stadium 19th/ 20th May 2012