OL3 27700 WMS inspire

I am just getting into OL3 from a GIS background - I don't have much of a programming background.

I am trying to use WMS layers from inspire in an OL3 app (http://ift.tt/1vtvVWH)

I have used the tutorial below as a start and I can get that working but I can't get an inspire WMS layers to work.

http://ift.tt/1ALxgiw

I am using Qgis for the gis work and I have checked the wms works in that fine.

Code for the layer I have tried

var lyr_NationalParksEngland = new ol.layer.Tile({
                    source: new ol.source.TileWMS(({
                      url: http://ift.tt/1ElGtAM,
                      params: {"LAYERS": "eainspire2011-wms-nationalparks_eng_inspire", "TILED": "true"},
                    })),
                    title: "National Parks (England)"
                  });