PHD won the account after a three-way pitch against Mediaedge:cia and Arena BLM, which was overseen by the AAR.
The incumbent, Manning Gottlieb OMD, which had held the business for over a decade, was not involved in the pitch.
of both its creative and media planning and buying accounts last month.
's creative account after a four-way pitch.
David Barker, head of communications at BHF, said: "Both Grey London and PHD excelled in their creative and longer term strategic thinking. We are looking forward to working with them to help fight the UK's biggest killer -- heart disease.
"This exciting new partnership with two terrific agencies will give us a consistent voice and approach in reaching highly diverse people with a range of important social and health messages."
BHF will be investing £5m in three campaigns over the next year, which the two agencies will be responsible for.
Daren Rubins, managing director for PHD UK, said: "The BHF are looking for clear, strategic thinking and powerful ideas that influence people, so it couldn't be a better partnership. We're absolutely thrilled to be chosen to help them."