* Less banks tightened credit standards in Q4 vs Q3 * More banks expect further tightening in Q1 * Mortgage demand expected to fall by quarter of banks * Banks repay some crisis funds early, no restocking in sight By Eva Kuehnen and Sakari Suoninen FRANKFURT, Jan 30 (Reuters) - Banks began early repayment of crisis funds to the European Central Bank on Wednesday, shrinking the ECB's balance sheet while the world's other big central banks are still spending to support their economies. Combined with lacklustre demand for weekly funding, it helped boost the euro to its highest level against the dollar since November 2011. An ECB survey separately showed that banks' access to market funding improved in recent months following the ECB's pledge to do what it takes to preserve the euro and the launch of a new bond purchase programme. However, new capital requirements and financial regulation led them to toughen loan standards. On Wednesday, banks returned about a quarter of the 489 billion euros they borrowed roughly a year ago in the first of the ECB's twin three-year loan offerings in a sign that they are less reliant on the crisis funds. The unwinding of the ECB's crisis loans operations is in stark contrast to the policies of the Bank of Japan, which earlier this month doubled its inflation target to 2 percent and made an open-ended commitment to buy assets from next year. In the United States, the Federal Reserve is expected to keep asset buying at $85 billion a month when it ends a policy meeting on Wednesday and to retain a commitment to hold interest rates near zero until unemployment falls to 6.5 percent. But in Europe, ECB President Mario Draghi dashed hopes for looser monetary policy by saying earlier this month "positive contagion" from improved markets and stabilising economic indicators would support a recovery later this year. So far, this has not filtered through to the economy. Banks made it harder for firms and consumers to borrow in the fourth quarter and expect to toughen loan requirements further in the months ahead. Demand for loans also fell and is expected to decreased further, which bodes ill for the recovery. "This illustrates the double credit whammy in the euro zone: Tightening of credit conditions on the supply side and a fall in demand, it's a squeeze on both sides," said Carsten Brzeski, economist at ING. "