Online Blockchain climbs after plans to open Gibraltar office A look at the major movers on the London market on Tuesday 11.46am: Blockchain business boosted Online Blockchain PLC (LON:OBC) is in demand after it announced the opening of an office in Gibraltar. The blockchain research and development company said Gibraltar offered a number of benefits including access to EU membership, tax-free income, a low annual renewal fee and freedom to conduct business globally. Chief executive Clem Chambers said: "Online Blockchain is particularly suited to such a benign and forward-thinking jurisdiction, and can capitalise on the many opportunities that Gibraltar affords."