Redland 49 roof tile redesign ?

[boringoldcodger]

I live in a Victorian house which many years ago (>30) was re-roofed using Redland 49 tiles.
2 tiles are cracked and I'd like to replace them although there's no obvious sign of a leak.
Greenjackets say "This tile has been improved" (link:
http://www.greenjackets.co.uk/Product/Redland-Interlocking-Tiles/Tile-Int-49-Redland-Antique-Red/498)

Does anyone know if it's OK to use new Redland 49s as replacements or am I better going for Marley Ludlow Plus which we're told (link:
//www.diynot.com/diy/threads/verge-problems-details-for-redland-49s.395308/#post-3044178) is the same.

Fortunately (from my point of view) access to the roof is easy as the house has parapet walls, the roof slopes gently and there's a trapdoor.

Many thanks for any advice (and apologies if the answer is already here but I haven't spotted it).

 

[Nige F]

Dunno about redlands being improved but I know Marley Ludlows are flat and redlands are bowed- got to replace some 49's put on my Marley roof, here and there, they don't lay right.

 

[boringoldcodger]

Thanks Nige F, it looks as though I ought to try the 49s.

 

[mfarrow]

Personally I would ask Redland, but the improvements are likely to be surface quality & susceptbility to moss.

Don't be surprised to see a colour difference and your new ones stick out like soar thumbs.