I often go to Regents Park in London two or three times a week as it´s almost on my doorstep.
The squirrels in the park really get to know you and will often jump up on to the bench and help themselves to the bag of nuts. During the Autumn, they love Hazelnuts as these are easier to bury than peanuts - they just can´t get enough of them.
Hazelnuts in Shells, highly recommended for squirrels stocking up their larders for the Winter.