ONE of the largest speculative office developments under construction in Belfast has received £20 million from an Executive backed loan scheme. Co Down investment firm Wirefox is behind the £45m Paper Exchange project on Chichester Street in the city centre. Set to be completed by the end of 2022, the 200,000 sq ft building will be capable of accommodating up to 2,000 workers. Derry construction firm Heron Bros is constructing the 11-storey building, which Wirefox expects will have a market value of around £70m. Wirefox said yesterday that the project remains on target following the commitment of a £20m loan facility from the Northern Ireland Investment Fund (NIIF).