El Alamein anti-tank ditches

[CountryBoy]

I just started a scenario from El Alamein against the AI and came across anti-tank ditches. It's the Operation Compass scenario. 

According to the manual only bridge engineer units can destroy an anti-tank ditch, which otherwise behaves like a canal. I tried using infantry in foot mode, but they can't cross an anti-tank ditch, which seems a little strange to me. Is this the way it's meant to be? 

I noticed in the comments section on the scenario in the Blitz database that Mr Grumpy said this:

We stopped this game at halfway point as we discovered that we were using old files which did not allow foot movement over AT ditch's, this very important fact had skewed the play to a point it was not worth carrying on, we did provide VM with feedback to improve the scenario some. :)