Royal Bank of Scotland plc, a group of 1980's-2000's issues, including £10, 1987, serial number A/1 000051, and £1, £5 and £20, 1987, £5 (4), one of each commemorative from 2004 and 2005, and 2014, £1 (5), one of each commemorative from 1992, 1994, 1997 and 1999,(Banknote Yearbook SC 852), uncirculated, and the £10 a nice low number (12).
Estimate: £180 - £220