| UX-B | Unexploded high explosive bomb. |
| UX-IB | Unexploded incendiary bomb. |
| UX-GB | Unexploded gas bomb |
| UX-APB | Unexploded anti personnel bomb |
| Small Yellow UXB | British anti aircraft bomb |
| UX-PM | Unexploded parachute mine |
| UX-TGM | Type G Mine (no parachute) |
| UX-AA | Anti aircraft shell |
| UX-C | Cannisters 14" x 3.25" in diameter |
| UX-Upshell | Metal tubular casing without a parachute 7' x 6" long |
| IBEN | Incendiary bomb (explosive nose) |
The police were responsible for ensuring the immediate safety of the public when UXBs were discovered. The police acted on recommendations of those trained in bomb reconnaissance both on the nature of risk and precautions to be taken.
The Bomb Reconnaissance Officer (BRO) was sent to the site to inspect and confirm the UXB giving its position by grid reference.
The following were the trained BRO officers surrounding Bridgend:
| Rank | Name | Area |
| P.S. 671 | J. Griffiths | Bridgend (C) |
| Inspector | W. Matthews | Porthcawl |
| P.S. 881 | J. Summers | Ogmore Vale |
| P.C. 447 | H. Hopkins | Pencoed |
| P.C. 410 | W. Matthews | Blaengarw |
| P.S. 231 | A. Page | Aberkenfig |
| P.C. 487 | P. Pritchard | Porthcawl |
| P.C. 71 | W.J. Hanlon | Caerau |
| PC.539 | G.S. Cosslett | Pentre Meyrick |
| P.C. 621 | Harding | Maesteg |
| P.C. 270 | B. Lloyd | Barry Dock (E) |
UXBs were categorised as follows:
| A | Immediate disposal essential for war effort |
| B | Important to war effort or to public morale but not necessary for immediate action. |
| C | Disposal necessary but not urgent |
| D | Not essential provided simple precautions are taken e.g. bombs in fields or open spaces. No danger to habitation or communications. |