| Group |
| Name | Club | Actual |
| Adjusted |
| Evt No: |
| 605 | (Age Adjusted) | Men | 50m Butterfly | Time |
| C |
| Mark Mason | Salisbury | 0 |
| 27.23 | 0 |
| 26.09 |
| C |
| David Emerson | City of Leeds | 0 |
| 27.32 | 0 |
| 26.20 |
| B |
| Nicolus Vaughan | Royal Navy | 0 |
| 27.27 | 0 |
| 26.38 |
| B |
| David Chaney | Gateshead & Whickham | 0 |
| 27.24 | 0 |
| 26.77 |
| H |
| David Cumming | Eastbourne | 0 |
| 33.21 | 0 |
| 26.94 |
| D |
| Simon Veale | Totnes | 0 |
| 28.93 | 0 |
| 27.00 |
| D |
| Trevor Clark | Camp Hill Edwardians | 0 |
| 29.37 | 0 |
| 27.13 |
| F |
| Bob Lord | Heart of England | 0 |
| 31.43 | 0 |
| 27.22 |
| A |
| Malcolm Stewart | Fins | 0 |
| 27.36 | 0 |
| 27.28 |
| C |
| Paul Easter | Nottingham Leander | 0 |
| 28.51 | 0 |
| 27.47 |
| D |
| David Francis | Heart of England | 0 |
| 29.49 | 0 |
| 27.63 |
| F |
| Derek Parr | Otter | 0 |
| 32.10 | 0 |
| 27.68 |
| E |
| Kenneth Vogel | Incas | 0 |
| 30.54 | 0 |
| 27.75 |
| H |
| Tom Robson | Glasgow Western | 0 |
| 34.75 | 0 |
| 27.82 |
| B |
| Duncan Hartley | Spencer | 0 |
| 28.41 | 0 |
| 27.96 |
| D |
| Blaise Ford | Nottingham Leander | 0 |
| 29.67 | 0 |
| 27.99 |
| C |
| Wray Shewell-Cooper | Potters Bar | 0 |
| 29.33 | 0 |
| 28.06 |
| D |
| John McGill | Waltham Forest | 0 |
| 30.30 | 0 |
| 28.12 |
| C |
| John Anderson | Gloucester | 0 |
| 29.90 | 0 |
| 28.31 |
| H |
| John Brogan | Motherwell | 0 |
| 34.89 | 0 |
| 28.44 |
| C |
| Mike O'Toole | Thamet Vikings | 0 |
| 29.55 | 0 |
| 28.54 |
| D |
| Simon Hindshaw | Glasgow Western | 0 |
| 30.44 | 0 |
| 28.55 |
| A |
| Simon Mullinger | Orpington | 0 |
| 28.78 | 0 |
| 28.57 |
| J |
| Seymour Banning | Kingston Royals | 0 |
| 37.43 | 0 |
| 28.62 |
| B |
| Patrick Gore | Clams | 0 |
| 29.34 | 0 |
| 28.84 |
| A |
| Chris Parkes | Stourport-on-Severn | 0 |
| 29.22 | 0 |
| 28.87 |
| B |
| Stephen Kenny | Kilmarnock | 0 |
| 29.83 | 0 |
| 28.90 |
| A |
| Keith Scott | Glasgow Nomads | 0 |
| 29.23 | 0 |
| 29.07 |
| D |
| Peter Gilpin | Street & District | 0 |
| 31.24 | 0 |
| 29.41 |
| B |
| Gavin Barlow | Swiss Cottage | 0 |
| 30.12 | 0 |
| 29.59 |
| A |
| Andrew Beadle | Gloucester | 0 |
| 29.87 | 0 |
| 29.60 |
| A |
| Keith Dunnett | Silver City Blues | 0 |
| 30.02 | 0 |
| 29.68 |
| A |
| Craig Noble | City of Glasgow | 0 |
| 30.17 | 0 |
| 29.74 |
| A |
| Russell Adam | Fins | 0 |
| 30.02 | 0 |
| 29.93 |
| D |
| Carl Freeman | Gloucester | 0 |
| 32.14 | 0 |
| 30.03 |
| A |
| Paul Bickell | Port of Plymouth | 0 |
| 30.63 | 0 |
| 30.29 |
| D |
| Bill Brampton | Gloucester | 0 |
| 32.55 | 0 |
| 30.66 |
| A |
| Mark Cooper | Havant & Waterlooville | 0 |
| 30.71 | 0 |
| 30.68 |
| B |
| Tim Walton | Heart of England | 0 |
| 31.28 | 0 |
| 30.71 |
| A |
| David Bell | Ards ASC | 0 |
| 30.98 | 0 |
| 30.74 |
| C |
| Thomas McQuillan | City of Glasgow | 0 |
| 32.20 | 0 |
| 30.98 |
| D |
| Tom Hill | Y Swim | 0 |
| 33.21 | 0 |
| 30.98 |
| D |
| Nick Hunt | Chelmsford Masters | 0 |
| 33.43 | 0 |
| 31.08 |
| D |
| Gordon McFadyen | Motherwell | 0 |
| 33.42 | 0 |
| 31.23 |
| C |
| Stephen Pople | Winchester City Penguins | 0 |
| 32.96 | 0 |
| 31.41 |
| D |
| Gordon Smith | Motherwell | 0 |
| 33.79 | 0 |
| 31.82 |
| A |
| Chris Shepherd | Nottingham Leander | 0 |
| 32.83 | 0 |
| 32.36 |
| C |
| James Tappin | Heart of England | 0 |
| 34.69 | 0 |
| 32.91 |
| B |
| Andrew Reid Jnr. | Forfar | 0 |
| 34.10 | 0 |
| 33.38 |
| B |
| Paul O'Hare | Motherwell | 0 |
| 34.24 | 0 |
| 33.50 |
| F |
| David Fuller | City of Chester | 0 |
| 37.80 | 0 |
| 33.59 |
| A |
| Simeon Hemming | Sutton Coldfield | 0 |
| 34.69 | 0 |
| 34.57 |
| J |
| Jack Anderson | City of Glasgow | 0 |
| 48.07 | 0 |
| 35.28 |
| C |
| Robert McKirdy | Glasgow Masters | 0 |
| 40.43 | 0 |
| 38.49 |
| H |
| Harry Hewitt | Dunfermline WPC. | 0 |
| 50.35 | 0 |
| 39.27 |
| H |
| Derek Bidgood | Port of Plymouth | 0 |
| 51.89 | 0 |
| 40.53 |
| H |
| Maurice McDonald | Ellesmere Port | 0 |
| 53.41 | 0 |
| 43.52 |
| 25 June 1998 | Page 24 of 31 |