Watch List notes:

Bank of England, P.S. Beale, a group of £1 (15), 1950, prefixes, H48B, J75B, K69B, L04B, M96B, N34B, O77B, R70B, S77B, T29B, U52B, W91B, X66B, Y97B, Z08B,
(EPM B268), a complete group of prefix ending in 'B' from this series, very fine to extremely fine, nice set (15).

Estimate: £120 - £180