Mr.Whiteley:

asked the Secretary for Mines whether he is now prepared to include in the regulations stemming plugs as a permitted method to be used in shotfiring?

The use of stemming plugs is permissible under the existing shot-firing rules, as long as the plugs and any attachment thereto are non-inflammable.

Mr. Whiteley:

Is the hon. Gentleman aware that this is not actually in the regulations, and that there is anxiety that it should be included among the permitted methods?

The regulation in question specifically mentions "clay or other noninflammable substances."