London Local Authorities and Transport for London (No. 2) Bill [Lords]

I do not wish to pre-empt my hon. Friend's speech on Report, but the gated roads provision says that relevant barriers should not be operated or interfered with ““without lawful excuse””. Does my hon. Friend have any idea—I do not see such an idea in the Bill—what constitutes a ““lawful excuse”” for interfering with a barrier?