Trousers plans

I've been looking at the Burda magazine and I think the plus version would be better, only I see it is for

Recommended Materials

Trouser fabrics. Fabrics with elastane are ideal.
Note: The finished trousers should stretch widthwise. Therefore, fabrics with lengthwise stretch should be cut widthwise, see marked grain line. Cut fabrics with crosswise stretch lengthwise, as usual.

 I have various non stretch trousers fabrics I want to use. If I go up a size do you think that would work? It seems a fairly classic trouser pattern (I do better without a front fly but do like pockets.)

UK PDF link
US PDF link
I have the original magazine so will be tracing that. On the measurement chart I seem to be closest to the size 46 for my bottom half. I am willing to have a go with some non stretch woven fabrics as muslins and see how I get on.

I am open to advice on this one please as would like lots of nice wearable trousers.