Reduce the list. Postcodes starting with:

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Postcodes (77 items):
B0C (1)
B0E (1)
B0H (1)
B0J (1)
B0K (1)
B0L (1)
B0M (1)
B0N (1)
B0P (1)
B0R (1)
B0S (1)
B0T (1)
B0V (1)
B0W (1)
B1A (1)
B1B (1)
B1C (1)
B1E (1)
B1G (1)
B1H (1)
B1J (1)
B1K (1)
B1L (1)
B1M (1)
B1N (1)
B1P (1)
B1R (1)
B1S (1)
B1T (1)
B1V (1)
B1W (1)
B1X (1)
B1Y (1)
B2A (1)
B2C (1)
B2E (1)
B2G (1)
B2H (1)
B2J (1)
B2N (1)
B2R (1)
B2S (1)
B2T (1)
B2V (1)
B2W (1)
B2X (1)
B2Y (1)
B2Z (1)
B3A (1)
B3B (1)
B3E (1)
B3G (1)
B3H (1)
B3J (1)
B3K (1)
B3L (1)
B3M (1)
B3N (1)
B3P (1)
B3R (1)
B3S (1)
B3T (1)
B3V (1)
B3Z (1)
B4A (1)
B4B (1)
B4C (1)
B4E (1)
B4G (1)
B4H (1)
B4N (1)
B4P (1)
B4R (1)
B4V (1)
B5A (1)
B6L (1)
B9A (1)