Can i claim for parking from estate agent/landlord

I moved in to my current property in Nov 2011.

When it was advertised, it was advertised as having 2 parking spaces,
but only when we moved in did we discover that it only had one parking
space, due to building still going on in the new development our second space
would only become available when the building work was complete, which
would turn out to be a year later.

I have 2 cars, both mine and my husbands car. It caused us a lot of hassle
with neighbours, as we would sometimes park in there space as they didn’t have
a car, but they still didn’t want us parking there, so my husband parked outside the
development on a public road for almost a year.

So my question is, I feel we were mislead by the estate agent and due to the
lack of the additional parking we've had countless run-ins with the neighbours.
So are we within our rights to ask for compensation from the letting agent/landlord
for the lack of the 2nd space? Obviously they included the parking spaces in the
monthly rental price of £1100.

Any comments would really be helpful as I really don’t know what to do, I’m very frustrated that it was not mentioned the parking space was only available once the development was completed, we are also moving out next month.

Thanks