No. 42 (Expeditionary Support) Wing RAF

{{Use dmy dates|date=March 2017}}

{{Use British English|date=March 2017}}

{{Infobox military unit

| unit_name = No. 42 (Expeditionary Support) Wing RAF

| image = No. 42 Wing RAF Badge.png

| image_size = 150px

| caption = Wing Badge

| dates = November 2007–present

| country = {{flag|United Kingdom}}

| branch = {{air force|United Kingdom}}

| type = Engineering

| size = Wing

| command_structure = No. 2 Group RAF

| garrison = RAF Wittering

| motto = Latin: "Fulmen Alatum Tenemus"
English: We hold in readiness the winged thunderbolts

| website = [https://www.raf.mod.uk/our-organisation/stations/raf-wittering/ RAF Wittering]

}}

No. 42 (Expeditionary Support) Wing RAF is a wing of the Royal Air Force A4 Force based at RAF Wittering. It provides high readiness, specialist engineering support for air operations around the world.

42 (ES) Wing was formed in November 2007 to provide a command structure for the Royal Air Force's engineering Air Combat Service Support Units (ACSSUs). Its name and badge are taken from that of No. 42 Group, which was responsible for Royal Air Force bomb and fuel storage during World War II. The Wing motto 'Fulmen Alatum Tenemus' translates as 'We hold in readiness the winged thunderbolts'.{{cite book|last1=Pine|first1=L.G.|title=A dictionary of mottoes|date=1983|publisher=Routledge & Kegan Paul|location=London|isbn=0-7100-9339-X|page=[https://archive.org/details/dictionaryofmott00tion/page/88 88]|edition=1|url-access=registration|url=https://archive.org/details/dictionaryofmott00tion/page/88}}