Filed under Rule 424(b)(5), Registration Statement Nos. 333-162219, 333-162219-01
Preliminary Pricing Supplement No. 50 – dated May 2, 2011 (to: Prospectus dated May 18, 2010 and Prospectus Supplement dated September 20, 2010)
CUSIP
Number
Aggregate Principal Amount
Price to
Public
Selling Commission
Net
Proceeds
Coupon
Type
Coupon
Rate
Coupon Frequency
Maturity
Date
1st Coupon
Date
1st Coupon
Amount
Survivor’s
Option
Product Ranking
78011RBU6
$
100%
1.075%
$
FIXED
 
2.15% (Per Annum)
 
MONTHLY
05/15/2014
06/15/2011
$1.97
NO
SENIOR
 
Redemption Information:  Non-Callable/Non-Puttable
 
Lead Manager and Lead Agent:  RBS Securities Inc.
 
The Royal Bank of Scotland plc
Offering Dates: 05/02/2011 through 05/09/2011
Trade Date: 05/09/2011 @ 12:00 PM ET
Settlement Date: 05/12/2011
Minimum Denomination/Increments: $1,000.00/$1,000.00
Guaranteed in full by The Royal Bank of Scotland Group plc
Initial trades settle flat and clear SDFS: DTC Book-Entry only
DTC Number 2230 via RBS Securities Inc.
 
If the maturity date or an interest payment date for any note is not a business day (as that term is defined in the prospectus supplement), principal, premium, if any, and interest for that note is paid on the next business day, and no interest will accrue from, and after, the maturity date or interest payment date.
 
Royal Bank of Scotland plc
Retail Corporate Notes
Prospectus dated May 18, 2010
and Prospectus Supplement dated September 20, 2010