MEWPs vs MEWP
The singular of Mobile Elevating Work Platforms (MEWPs) is Mobile Elevating Work Platform (MEWP). When written as an acronym use the lower case s as opposed to a capital S. Only use an apostrophe if denoting MEWP ownership.
“The MEWP’s telescopic boom had a working outreach of 15 mtrs. However the project required a selection of MEWPs including at least one mobile vertical type MEWP to complete all work safely”.