Will bees get through this?

I've just planted some broadbean seeds and put an old fire guard round to keep cats and pigeons off and provide support for the plants. I was just wondering if bees will be able to get through the gaps to pollinate the flowers? The gaps a about an inch wide.

 

Think that would be fine, 6mm dia for bee hotel, 20mm for hive entrance....

 

Thanks that's great. I just hope slugs are not too much of an issue

 

Good secure place for a slug pub !