The mobile app cross-promotion platform has added the bank-backed BGF Ventures to its list of shareholders having raised $1.4m in seed funding in 2014.

UK-based ad exchange platform Tapdaq has received $6.5m in a series A round from investors including BGF Ventures, the venture capital arm of UK-government mandated growth equity firm British Growth Fund, Sky News reported on Wednesday.

VC fund Spring Partners and venture firms Balderton Capital and Open Ocean Capital also took part in the round.

British Growth Fund is a £2.5bn ($3.6bn) initiative set up by the UK government and backed by five domestic banks: Barclays, HSBC, Lloyds, RBS and…