Type of tile/slate?

[rolo5]

Hi,

Could anybody tell me what type of roofing material this is? I need to replace some of the slates/tiles..

http://maps.google.co.uk/maps?q=LS1...dww0kfqMXkZyam-b7UnUqg&cbp=12,263.19,,2,-7.31

 

[SurreyRoofingEstimator]

They're double roman could be Marley, Sandtioft or Redland, it should be fairly simple to remove one and look at the back where it should state the manufacturer

 

[rolo5]

Ok, thanks... will have a look