\begin{table}%t7
%\centering
\par
\caption{Upper limits to the observed ionising flux illuminating clouds with no
associated radio emission. The predicted ionising fluxes are  calculated
from the spectral type and projected distance of the ionising stars contained in Table
\ref{tbl:ionising_stars}.\label{tbl:uplim}}
\begin{tabular}{lccccc}
\hline
\hline
Source ID & $\lambda$ & 3$\sigma$ flux upper limit & Cloud radius & Max.~observed ionising flux &
Predicted ionising flux \\
 & (cm) & $S_{\rm max}$ (mJy) & $R$ (pc) & $\Phi_{\rm max}$ (10$^{6}$ cm$^{-2}$~s$^{-1}$) &
$\Phi_{\rm P}$ (10$^{6}$ cm$^{-2}$~s$^{-1}$) \\
\hline
SFO 45 & 20 &    5.16 &  0.30 &  24 &	  38 \\
SFO 46 & 13 &    0.75 &  0.05 &  18 &	  13 \\
SFO 48 & 20 &    2.58 &  0.01 &  20 &	  15 \\
SFO 50 & 20 &    3.60 &  0.05 &  21 &	  41 \\
SFO 51 & 20 &    2.82 &  0.15 &  19 &	  69 \\
SFO 52 & 20 &    9.45 &  0.20 &  78 &	  8.6\\
SFO 53 & 20 &    9.60 &  0.10 &  84 &	  9.0 \\
SFO 54 & 20 &    5.10 &  0.21 &  36 &	  0.6 \\
SFO 55 & 20 &    1.50 &  0.48 &  11 &	  23 \\
SFO 60 & 20 &  360.00 &  0.12 & 2900 &   2500 \\
SFO 71 & 13 &    4.10 &  0.61 &  140 &     0.06 \\
SFO 72 & 20 &   10.80 &  0.54 &  92 &	  820 \\
SFO 73 & 13 &    3.00 &  0.27 &  100 &     190 \\
SFO 80 & 20 &   30.00 &  0.28 &  220 &    230 \\
SFO 81 & 13 &    6.90 &  0.19 &  190 &     270 \\
SFO 86 & 13 &    3.00 &  0.36 &  56 &	  1600 \\
SFO 87 & 20 &  126.00 &  0.43 &  500 &     1300 \\
SFO 88 & 20 &   78.00 &  0.40 &  300 &      990 \\
\hline
\end{tabular}
\end{table}