python 2.7 - Getting attribute value from vector layer after mouse click in PyQGIS?

I am trying to write a piece of PyQGIS code that runs after a mouse click to collect the Map Coordinate position, and the value of a polygon vector layer within the project under the cursor position.

The vector layer is called 'Parish Boundaries'. The attribute I would like the value of is called 'name'. The first bit in the canvasReleaseEvent makes sure that the correct layer is selected, regardless of how its named.

I then have got very confused as to how to get the attribute value.

So far, I have the following:

class FaultTool(QgsMapTool):

def __init__(self, canvas):
    QgsMapTool.__init__(self, canvas)
    self.canvas = canvas

def canvasReleaseEvent(self, event):


    parish_layer = None
    layers = self.canvas.layers()
    for each_layer in layers:
        if each_layer.source() == "C:/MapData/QGIS/Base Maps/Other Layers/Parish Boundaries.shp":
            parish_layer = each_layer.name()


    x = event.pos().x()
    y = event.pos().y()

    parishName = # This is the bit I can't work out!
                 # something like....event.pos().attributes()[0]...?

    point = self.canvas.getCoordinateTransform().toMapCoordinates(x, y)