Motorists in the US and Europe who bought a Tesla in recent weeks have been expressing their anger after the car maker slashed prices by thousands on Friday. In the UK, the starting price for a Model Y has been cut by £7,000 to £44,990 while the price for an entry level Model 3 has been reduced by £8,100 to £42,990. Recent US buyers meanwhile have realised that they have lost out on as much as $13,000 following price cuts of almost 20%. Consumer website Electrifying.com calculated that drivers who bought a Tesla last month could have saved a total of £130 million if they had waited for the dis…