Offset

"He described a timetable x-gu://item/mobile.guardianapis.com/items/commentisfree/2016/nov/03/the-guardian-view-on-article-50-ruling-parliament-is-the-winner and guarantees on EU funding as encouraging signs, adding: “It’s offset uncertainty around Brexit with greater certainty x-gu://item/mobile.guardianapis.com/items/uk-news/2016/nov/17/heathrow-protests-climate-campaigners-locals-third-runway and x-gu://list/mobile.guardianapis.com/lists/tag/uk-news/hinkley-point-c.”" (The Guardian.)

Is "It's offset..." in the present perfect in the text above?