The government-backed flood insurer paid out more than in its first three years combined, plus, it also welcomed changes to the scheme enabling discounted premiums.
Commercial director Nigel Phillips says performance was impacted by the "challenging economic and political climate".
The global insurer has estimated a $1.36bn hit arising from Covid-19.
But the business also saw a fall in profits as MD Tony Buss says provider has revised its expectations for 2020 due to the pandemic.
The results for 2019 showed a decrease in profits but GWP grew by 3.6% to £257m as broking division makes a loss.
Software house has also seen a dip in operating profit as results reveal it paid £10.8m for Canadian business Zycomp Systems last July.
Organisation has also seen an increase in membership volumes.
The insurer said most of its BI policies do not cover impacts arising from Covid-19.
The business highlighted Ebitda and acquisitions as it points to “limited” Covid-19 impact.
COR crept above 100% across all business lines in Q1 due to storms.
The provider published a Q1 trading update, the first to incorporate Allianz, LV and Legal & General, as it says it has made 200-plus Covid-19 claims pay outs.
The insurer also published a trading update which addressed the current Covid-19 business interruption dispute.
Provider also posts increases in GWP and profit after tax as it reports "disappointing" personal motor result impacted by claims inflation and a "lower than anticipated" Ogden rate.
Insurers point the finger at increased claims and unexpected Ogden rate change in a challenging year
Broking, underwriting and travel profits all fell, as the group renegotiates its loans to accommodate for lengthy travel suspensions.
Company said the number of policies it manages, as well as income per policy, had risen over 2019.
CEO John Neal urges the industry to "put a lot more effort" into explaining products to clients.
Losses for the group shrank as operating profit grew to £3.4m as broker reports 3.3% organic growth.
Market says it is in a "strong position" to respond to the impacts of the coronavirus.
But CEO Steve Treloar says premiums in the provider's broker business has grown by 24% after Allianz's personal lines business transferred to LV.
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General insurance CEO, Colm Holmes, says provider has exited some "unprofitable relationships" in personal lines, but highlights Aviva will "significantly invest" in the broker channel going forward.
Increase in UK profits of £41m absorbed losses made in international insurance, Admiral Loans, and other business.
Aviva says UK business was impacted by an alignment of the UK digital business with GI, as CEO Maurice Tulloch says provider has made "good progress" on its cost-cutting plan.