LONDON, May 28 (Reuters) - West African crude oil differentials were steady on Wednesday after what traders have called a slow kick-off to the July loading programme.
* Trading of July-loading cargoes is off to a gradual start, a trade source said.
* June cargoes remain unsold from Nigeria even as July loading programmes surface.
* Recent offers include Bonny Light at dated Brent plus $1.50 a barrel, Bonga at dated Brent plus $3.50, Erha at dated Brent plus $2.50 and Forcados at dated Brent plus $3. No updated offers were heard on Wednesday.
* A fire on an offshore oil platform in Angola operated by Chevron last week hasn't had much of an impact on prices, a source said.
(Reporting by Anna Hirtenstein and Alex LawlerEditing by Kirsten Donovan)
((anna.hirtenstein@thomsonreuters.com;))