By Ruby Flanagan Ring doorbell customers are outraged as they are set to see their subscription bills rise by almost 100% in two years. The Amazon-owned smart doorbell company announced that its basic plan in the UK is increasing in price by 42%. The rise will now see customers who were previously paying £34.99 per year, or £3.49 a month, be charged around £15 more if they’re an annual subscriber, or £18 if they pay monthly. Their bill will rise to £49.99 per year, or £4.99 a month. This is the second inflation-busting price rise in the last two years with customers now paying 100% more than i…