It's a mistake to conflate cyclists filtering through traffic and undertaking. The Highways Code specifically mentions that motorcycles do this also Rule 88 [1

It's a mistake to conflate cyclists filtering through traffic and undertaking. The Highways Code specifically mentions that motorcycles do this also Rule 88 [1] and tells drivers that that they should be aware of other road users including cyclists doing this too [2] Rule 21. [1] https://www.gov.uk/guidance/the-highway-code/rules-for-motorcyclists-83-to-88 https://www.gov.uk/guidance/the-highway-code/rules-for-motor... [2] https://www.gov.uk/guidance/the-highway-code/road-users-requiring-extra-care-204-to-225 https://www.gov.uk/guidance/the-highway-code/road-users-requ...