Spare buggies in Heathrow terminal 2

[peggoula]

Anyone knows if there are apare buggies in Heathrow and particularly in terminal 2 the way there are around Gatwick?

Flying to Greece on the 29th and only need the buggy if there are miles to walk as 2 year old boy is good with walking but not at the direction you need to be going.

Thank you in advance.