A self-employed plumber has branded the UK Government 'heartless' after being fined for not submitting his accounts while his dad was hospitalised with coronavirus.Chris Nixon was slapped with the penalty after they arrived late to Companies House in February, according to Manchester Evening News.Now the 42-year-old, who owns a small business, faces an even bigger fine after an inaccuracy was identified - something his dad Trevor would have spotted.The 70-year-old is employed as his son's accountant and usually deals with his finances, but was taken into hospital several weeks ago with the deadly bug.Trevor's condition has been "touch and go" for a number of weeks while intensive care.Chris said: "Just as lockdown happened my dad went into