By Tim Cocks    JOHANNESBURG (Reuters) – Terry and Roger Hugo, both equally retirees in their 70s, could not hold out to see their grandchildren come more than to stop by South Africa from Britain for the to start with time, after cancelling previous year’s Christmas options mainly because of COVID-19.    Now they are mortified at having to get in touch with anything off again immediately after a new coronavirus variant detected in South Africa prompted Britain to slap a travel ban on its previous colony.    “We’re unquestionably gutted. I can not tell you how upset we are with this whole predicament,” reported Terry, 74, breaking into tears on the leafy…