European Champions Cup organisers fear half-empty Twickenham final

• Only 8,000 French fans are expected for Toulon v Clermont• Just 30,000 of the stadium’s 82,000 seats have been sold• Delon Armitage is an injury doubt for Champions Cup finalOrganisers fear there may be 40,000 empty seats when Clermont Auvergne and Toulon contest the European Champions Cup final at a sparsely-attended Twickenham. The 82,000-capacity stadium is set to be half empty on Saturday week for the first final since the old Heineken Cup was mothballed last year.Despite the presence of two French clubs, it is understood no more than 8,000 supporters are planning to travel to London for…