Thanks for the additional information and corrections.
There are 19 (the site for some reason says 20) entries for George Todd, covering three seasons from 1949 to 1952. In five matches he was the referee, while in the others he was a linesman. In those days referees on the Football League Supplementary List were also given appointments as linesmen.
20.8.49 Newcastle Utd vs Portsmouth R: H.C. Williams (Fulham); L. G. Todd & W. Heselton (West Hartlepool)
1.10.49 Newcastle Utd vs Stoke C. R: A.C. Denham (Ashton-on-Ribble); L: G. Todd & E.E. Hall (Ferryhill)
5.11.49 Sunderland vs Charlton Ath. R: H. Peacock [sic] (Scunthorpe); L: G. Todd & J. Gardner (Middlesbrough). For Peacock read Beacock
26.12.49 Huddersfield T. vs Manchester C. R: R.J. Leafe (Nottingham); L: G. Todd & C.P. Walker (Sheffield)
4.3.50 Liverpool vs Blackpool (F.A. Cup, 6th round) R: B.M. Griffiths (Newport); L: G. Todd & A.B. Bailey (Stockport)
*11.3.50 Manchester C. vs Bolton W. R: G. Todd; L: T. Hitchen (Winsford) & H. Dalton
8.4.50 Huddersfield T. vs Derby Co. R: H. Beacock; L: G. Todd & J.A. Cattlin (Rochdale)
26.8.50 Newcastle Utd vs Everton R: H.R.A. Mortimer (Huddersfield); L: G. Todd & W.Heselton
7.10.50 Sunderland vs Huddersfield T. R: F.H. Gerrard (Preston); L: G. Todd & E.E. Hall
18.11.50 Blackpool vs Huddersfield T. R: G. Todd; L: J.H. Andrews (Manchester) & L.J. Hamer (Horwich)
*9.12.50 Huddersfield T. vs Manchester U. R: S.E. Law (West Bromwich); L: G. Todd & H.R. Smith
26.3.51 Sunderland vs Newcastle Utd R: B.J. Flanagan (Sheffield); L: G. Todd & E.E. Hall
§7.4.51 Newcastle Utd vs Tottenham H. R: W.H.E. Evans (Liverpool); L: G. Todd & A. Brown (Middlesbrough)
§7.4.51 Huddersfield T. vs Blackpool R: G. Todd; L: F.I. White & G.F. Peverell [or Peverelli?] (Doncaster)
§*5.5.51 Sunderland vs Wolverhampton W. R: E. Plinston (Warrington); L: G. Todd & G. Todd (!)
*29.8.51 Newcastle Utd vs Bolton W. R.: H. Beacock; L: G. Todd & H. Hawthorne (Willington)
*20.10.51 Bolton W. vs Huddersfield T. R: G. Todd; L: G.A. Pickering & T.B. Edwards (New Ferry)
16.2.52 Sunderland vs Bolton W. R: A.W. Luty (Leeds); L: G. Todd & R. Fenwick (Newcastle)
8.3.52 Huddersfield T. vs Bolton W. R: G. Todd; L: G.A. Beecroft (Hull) & R. Lynch
Matches for which the programme pages are not reproduced are indicated by an asterisk.
§ It would seem from this that Mr Todd was blessed with the gift of bilocation. On 5 May 1951 the site suggests that he was expected to run both lines simultaneously. Unfortunately, since in this case the match programme is not reproduced, the correct identity of the second linesman cannot be established. The case of 7 April 1951, when Mr Todd seems to have been expected to officiate in two matches in two separate locations, is more complicated. Both match programmes are reproduced, both give the date as 7April and both indicate Mr Todd in the respective functions of linesman and referee. Discarding the attractive, but implausible theory of bilocation, we are left with several possible explanations, and perhaps someone with access to other sources can establish what really did happen on that date.