He won six matches in the 1992 Dubai Classic but was defeated by Mark Davis 1–5 in the seventh qualifying round, losing his eighth match in that year's Grand Prix also to Davis by the same scoreline, and lost 4–5 to Andrew Cairns in the last 128 at the British Open.

At the 1993 World Championship, qualifying for which was held near the start of the season, Giles defeated Tessa Davidson 5–3, Stan Haslam 5–1, Paul Maskell by the same scoreline, Barry Bunn 5–2, Simon Haggerty 5–0, Jamie Woodman 5–2, Andrew Cairns 10–2, Tony Meo 10–9, John Campbell 10–3 and Tony Knowles 10–6 to reach the last 32 stage - the first round at the Crucible Theatre.

[1] Reaching the Crucible earned Giles £8,000, but his best performance the following season was a run to the last 96 of the 1993 UK Championship, where he lost 1–5 to a resurgent Alex Higgins.

Giles progressed to the last 96 at two ranking events the following season; at the 1994 UK Championship, he lost 4–5 to Danny Fowler, and at the 1995 British Open, Steve Newbury defeated him 5–2.

Some success came in 1995/1996; Giles reached the last 32 at the 1996 Welsh Open, defeating Hugh Abernethy, Joe Jogia, Les Dodd and Martin Clark before being whitewashed 5–0 by Drew Henry.