Note 50 Operating income
€ million | 2019 | 2018 |
Revenue | 28 | 27 |
Own work capitalised | 35 | 33 |
Other income | 269 | 346 |
Total | 332 | 406 |
Revenue mainly comprises charges passed on for CDMA data communication network services. The other income chiefly relates to group-wide activities at holding company level. In 2018, other income included a non-recurring book profit on the sale of Allego (€105 million).